Process Involved in Acquiring and Consuming Food – When a right whale is feeding, it “grazes” by moving slowly through swarms of small zooplankton (animal plankton) with its mouth open. This type of feeding has been referred to as “skim-feeding” at the surface, although right whales also consume food below the surface.
A right whale’s mouth has a gap in the front baleen plates, which allows water and zooplankton to enter the animal. The water travels through the baleen and exits the sides of the mouth, carrying with it the zooplankton that is trapped in the finely fringed mat of baleen. The right whale’s large baleen plates and enormous mouth are perfectly suited for the task of straining an enormous quantity of food.
Although right whales often feed alone, it is possible for a group of whales to swim in a V-formation when feeding. Rorqual whales consume their food by shoving huge mouthfuls of water and prey into their mouths at once. The neck grooves of a rorqual get larger when its mouth is filled, and its mouth cavity inflate outward as a result.
- The whale will then draw its jaws together and constrict the throat grooves, which will force water out of the whale’s body.
- Because water is being driven through the baleen and out the sides of the mouth, the baleen mat is able to trap prey such as krill and tiny fishes.
- Feeding can take place either on the surface or deeper in the water for rorquals.
Some rorquals have been seen sweeping or flicking prey swarms into their mouth area with the flukes on their tails. It has been noticed that humpback whales would blow “bubble nets” in order to assist them in feeding. The whale makes a downward dive, after which it swims upward in a spiral, exhaling air bubbles via its blowholes the whole time.
The bubbles rise up in a column, containing the prey within the column as they do so. The whale makes a vertical ascent through the middle of the structure with its mouth wide open. Several humpback whales have been witnessed by observers lunge-feeding up through a “bubble net” one at a time. As is the case with right whales, skim feeding has been seen in sei whales as well.
The majority of a gray whale’s diet consists of bottom-dwelling organisms. When feeding, a gray whale must turn over onto its side in order to access the water, mud, and bottom-dwelling crustaceans that are plentiful in ocean sediments. The amphipods and marine worms that the gray whale eats are the ones that get caught in the short, coarse baleen mat.
- Both water and muck are expelled from the baleen after passing through it.
- In feeding places for gray whales, scientists have noticed massive dug regions on the ocean floor.
- They have also seen gray whales surfacing while trailing streams of mud.
- It would indicate that the majority of gray whales have a “right-handed” orientation.
When they are nursing, they roll onto their right side. Some people like to sit on the left. Examining the baleen of a gray whale reveals this fact rather clearly since the baleen is shorter and exhibits greater wear on one side than the other. It is possible for gray whales to consume prey that is swimming through the water column as they are migrating.
- 1 How much do whales eat everyday?
- 2 How much does a whale eat at a single meal?
- 3 What are whales favorite food?
- 4 How big of a fish can a whale eat?
How much do whales eat everyday?
Savoca believes that this discovery helps address another puzzle, which is why the waters off the coast of Antarctica aren’t teeming with krill and why it’s been a mystery. Savoca refers to the industrial whaling that occurred in the 1900s as “one of the most successful and efficient extermination operations in the history of Earth.” The 1900s were a time when baleen whales, who were the major predators of the small crustaceans, were practically wiped out.
According to Savoca, even though people are harvesting krill at an increasing rate for use as fish food and for the oil they contain, which is rich in nutrients, this industry is not large enough to explain why the polar waters are not teeming with this essential food source for whales, seals, and other marine mammals.
John Martin, a marine biogeochemist, postulated in the late 1980s that a deficiency of iron in the Southern Ocean was causing a reduction in the population of phytoplankton, which is an essential source of nutrition for krill. Iron may only be required in minute quantities by plants and animals, yet its absence is fatal to both groups.
- (To find out why the Southern Ocean is considered the fifth and most recent ocean, read on.) Experiments conducted afterwards revealed that whale poop contains some of the highest concentrations of iron of any substance found in the water.
- This iron supply, together with dust from the Sahara Desert and other terrestrial sources, constituted the backbone of the iron cycle in the Southern Ocean.
Through the process of consuming, digesting, and expelling krill, whales are able to carry iron up from the depths of the ocean and deposit it in their floating excrement, where it may be used by the phytoplankton that serve as krill’s primary food source.
- A positive feedback loop is created when there is more excrement because it leads to more phytoplankton, which in turn leads to more krill, which can sustain more whales.
- According to Savoca, it makes perfect sense that the krill numbers have not yet recovered because the populations of Antarctic baleen whales, notably southern fin and minke whales, are continuing to grow.
But there are some reasons for optimism: During the middle of the 20th century, there were just 450 humpback whales in the western part of the South Atlantic. Today, there are 25,000 of these whales.
How much food do blue whales eat a day?
What do blue whales eat? Blue whales consume krill, which is a type of crab that resembles a shrimp and can be found in the waters all over the world. The enormous whales are able to consume up to four tons of krill on a daily basis. The blue whale is the only mammal on Earth that can consume more food in a single bite than any other species.
- Blue whales are known to swim through vast swarms of krill with their jaws wide open.
- Krill are responsible for the vast bulk of a blue whale’s daily caloric intake.
- The blue whale is an example of a filter-feeding whale.
- Its neck has a mechanism that allows it to expand, and it is pleated, so that it can swallow a volume of water and prey that is more than the animal’s own body weight.
The water that it consumes at the same time as its food is expelled from its mouth by its huge tongue, which moves it through baleen plates that resemble strainers and dangle downward from the upper jaw. Watch a blue whale as it makes a diving attempt to capture its prey.
How much does a whale eat at a single meal?
The blue whale, which can weigh up to 135 tons, is the heaviest and most massive mammal that lives on our planet. When people see the enormous size of the whale’s jaw bone on exhibit at the CIMM, they sometimes wonder how much food a single whale can consume in a single bite, in a single day, in an entire year.
The blue whale consumes literally tons of the microscopic crustacean known as krill on a daily basis since it is its only source of food. A single day of eating may result in a blue whale consuming 16 tons of krill, which is equivalent to 12 percent of its total body weight! According to the findings of a research that appeared in the November 2017 issue of the peer-reviewed scientific magazine Nature, this is the case.
It is possible that members of this species consume three times the amount of prey than was previously thought. In a strange way, this is encouraging information: it is possible that the increase in the number of whales would be much more helpful to the environment of the ocean than was previously believed.
How much fish do whales eat a day?
WHALES ORCA WHALES DIET AND TEETH Orcas are highly skilled predators that consume a wide variety of prey, including fish, squid, sharks, turtles, octopi, and birds. Marine mammals, such as whales and seals, also make up part of their diet (penguins and gulls).
- Even juvenile blue whales and other huge whales have been reported to be the target of their attacks.
- They have 10–13 pairs of massive, conical, enameled teeth that interlock with one another and are scattered throughout BOTH their upper and lower jaws (for a total of 20 to 26 pairs, so the orca has from 40 to 52 teeth).
This allows the orca to more easily capture its prey, as the teeth bend inwards and rearward. Teeth have a length of around 7.6 centimeters and a diameter of approximately 2 centimeters on average, although some are significantly longer. When hunting, members of a pod will usually work together.
- A daily diet of 551 pounds (250 kg) of food is required for an orca of an average size.
- SOCIAL GROUPS Orcas are highly gregarious creatures that congregate in small pods ranging in size from six to forty whales.
- Orca pods are communities of animals that live in close proximity to one another and share a strong social structure.
The individuals who make up a pod hunt together in a highly strategic manner, bringing down even extremely huge prey and then dividing it among themselves afterward. The members of the pod look out for the well-being of the young, the ill, and the injured.
- DIVING, BREACHING, SPYHOPPING, AND TAIL SLAPS In order to find prey, orcas are able to dive as deep as 100 feet (30 meters).
- In most cases, orcas will breach (swim at very fast speeds toward the surface in order to rise above the surface of the water and then fall back onto the surface, splashing and making noise).
Spyhopping, which refers to the act of popping the head out of the water in order to look about, and tail slapping are two more typical behaviors shown by orcas. It is unclear what these efforts are meant to accomplish. SPOUTING – BREATHING Orcas have a blowhole towards the top of their heads, which allows them to take in air from the air at the surface of the water.
- Their breeze is a single, dense cloud that is low and bushy.
- SPEED Orcas are able to swim at very high speeds.
- In order to catch prey, they are capable of swimming fast bursts of up to 48 kilometers (30 miles) per hour.
- VOCALIZATION Orca communication consists of clicks, whistles, and pulses that sound like screams.
Clicks are used in echolocation. These noises are utilized for a variety of functions, including mating, communication with other orcas, and finding their prey. The members of the various pods, which are long-lasting groups of orcas, each have their own distinct “accents,” which they use to identify each other.
- HABITAT AND RANGE ARE THE TWO Orca whales may be found in seas spanning from the tropics to the arctic, including coastal as well as deep oceanic regions.
- They can be found in the majority of the world’s seas and all of the oceans in the globe.
- Orcas are known to venture into estuaries on occasion, although they never travel very far inland.
HUMPBACK WHALES GENERAL DESCRIPTION The humpback whale is a kind of rorqual whale and a baleen whale, and it is known for its incredible sounds. It engages in intricate feeding behaviors that include working together with other animals. The head of the humpback whale is large and rounded, and it is covered with protuberances known as tubercles.
Each tubercle contains a bristle. The breaching and slapping of the water by humpback whales gives the impression that they are performing acrobatics. They have two blowholes and dwell in groups called pods. The whale is given its common name, “humpback,” for the action it makes as it lifts its head and shoulders out of the water prior to diving.
SIZE The adult length of a humpback whale is approximately 52 feet (16 meters), and they weigh between 30 and 50 tons (27-45 tonnes). As is the case with other baleen whales, the females are a little bit bigger than the males. The four-chambered heart of a typical humpback whale weighs around 430 pounds (195 kg), which is almost the same amount as the combined weight of three typical adult humans.
- SKIN, SHAPE AND FINS There are four distinct color patterns that may be found on humpbacks, ranging from white to gray to black to mottled.
- On the underside of the flukes, there are recognizable areas of white coloration (tail).
- These marks, much like a person’s fingerprints, are specific to each individual whale.
The skin of the humpback whale is commonly scarred and may have areas that are coated with barnacles. From the chin to the navel, humpback whales have 14–35 neck grooves that run in a zigzag pattern. Because of these grooves, their neck is able to stretch to accommodate the massive amounts of water that they take in during filter feeding.
- They have knobs or tubercles, which are little, circular lumps on the front of their skull that edge their jaws.
- These knobs may be seen on both sexes.
- The flippers of humpback whales are the biggest of any whale species, measuring up to one-third of the animal’s total length and featuring a mottled white and gray pattern with rough edges.
The genus name for the humpback whale, Megaptera, literally translates to “huge-wings,” which refers to the whale’s flippers. There is a possibility that the flippers have barnacles developing on them. The flukes, often known as the tail, can reach a width of up to 37 meters (12 feet).
- The dorsal fin of humpback whales is rather tiny and is located closer to the flukes.
- DIET AND BALEEN All baleen whales, including humpback whales, are seasonal feeders and carnivores.
- They feed by filtering the water for microscopic crustaceans (krill, primarily Euphausia superba, copepods, and so on), plankton, and small fish (including herring, mackerel, capelin, and sandeel).
They are filter feeders known as gulpers (as opposed to skimmers), and they alternate between swimming and taking large mouthfuls of plankton or fish. This technique of feeding is most suited for taking advantage of concentrated quantities of prey. During the feeding season in cold waters, an average-sized humpback whale would consume between 4,400 and 5,500 pounds (2000 and 2500 kg) of plankton, krill, and tiny fish schooling together each day (about 120 days).
They get two meals each day. The cooperative hunting of humpbacks has resulted in the development of a technique known as bubble-net feeding, which is used to gather large numbers of highly concentrated groups of prey. The individuals of a pod that are hunting create a circle that is three to one hundred feet (3.1 to 31 meters) broad and around fifty feet (15 meters) below the surface of the water.
After then, the humpback whales expel a wall of bubbles as they spiral their way to the top of the water. The bubble wall in the shape of a cylinder causes the krill, plankton, and/or tiny fish that have been ensnared to rise to the surface of the water in a massive, concentrated mass.
- After that, the humpback whales consume a substantial and filling meal.
- The humpback whale has approximately 330 pairs of baleen plates that are a dark gray color and have coarse gray bristles hanging from their jaws.
- They have a length of around 26 centimeters (0.6 m) and a width of approximately 13.5 inches (34 cm).
SOCIAL GROUPS The humpback whale migrates in vast, dispersed pods. The majority of relationships between humpback whales are transient, only lasting a few days at most. One notable exception is the profound and everlasting connection that exists between mothers and their young.
- DIVING, BREACHING, SPYHOPPING, AND LOBTAILING Although humpback whales have the ability to stay underwater for up to 30 minutes at a time, their dives often only last up to 15 minutes.
- The maximum depth that humpbacks may dive to is between 500 and 700 feet (150-210 m).
- BLUE WHALES SIZE On average, blue whales reach a length of around 25 meters (80 feet), and they may weigh up to roughly 120 tons (109 tonnes).
The most impressive specimen was a female that measured 94 feet (29 meters) in length and weighed more than 174 tons (158 tonnes). As is the case with all baleen whales, the females are significantly bigger than the males. The largest of the blue whales, which can weigh up to 150 tons, has a heart that is around 1,000 pounds (450 kg) in weight and carries 14,000 pounds (6,400 kg) of blood through its body at any given time.
- The size of the heart is comparable to that of a Volkswagen beetle.
- It is possible for a human to crawl via the aorta (a major blood vessel).
- SKIN, SHAPE AND FINS The skin of a blue whale often has a blue-gray background with white-gray patches.
- The underside features spots that are either brown, yellow, or gray.
They are frequently referred to as “sulfur bottom” because of the yellow to silver to sulfur-colored shine that diatoms provide to the underbelly when they attach to the underside throughout the winter in cold waters. They have a very short dorsal fin that is in the shape of a falcate (sickle), and it is situated close to the flukes (tail).
- The flippers of blue whales are long and narrow and measure 8 feet (2.4 m) in length, while the width of their flukes measures 25 feet (7.6 m).
- DIET AND BALEEN The blue whale, like all other baleen whales, is a seasonal feeder and a carnivore.
- It uses its baleen plates to filter food from the water, consuming small fish, crustaceans (such as krill and copepods), and plankton.
They are filter feeders that swim and then gulp a mouthful of plankton or fish; they lunge into dense clusters of small sea animals (krill or tiny fish) with an open mouth. Gulpers are also known as gulpers. The throat can develop a gular pouch if it has between 50 and 70 throat pleats, which allow for significant expansion.
After that, the water is pushed to pass through the baleen plates that are suspended from the upper jaw. The baleen serves as a sieve, catching the food as it passes through. There are approximately 320 pairs of black baleen plates that are covered with dark gray bristles and found in the jaws of the blue whale.
They have a length of around 1 meter, a width of approximately 21 inches (53 cm), and a weight of approximately 100 kg (90 kg). The tongue is four tons in weight (3.8 tonnes). During the summer feeding season in the frigid waters of the Arctic, a blue whale of average size will consume 2,000-9,000 pounds (900-4100 kg) of plankton every single day ( about 120 days).
Which whale eats the most?
Diets of blue whales Blue whales are the biggest animals that have ever existed, and their diets reflect this fact. These enormous cetaceans may grow to be 30 meters long and weigh up to 180 tons, which means that they require a substantial diet in order to maintain their ability to swim.
- But in spite of their gigantic size, blue whales get practically all of their nutrition from krill, which are shrimp-like crustaceans that only reach a maximum size of around six centimeters.
- These little creatures may be observed swimming in large swarms across the waters of the planet, which can number more than 30,000 individuals at a time.
The blue whale has one of the most voracious appetites of any known animal, and it can consume up to four tons of krill in a single day. When feeding, blue whales, which have baleen plates, take enormous mouthfuls of water and food at the same time. They use the plates of their baleen to act as a sieve and then force the water back out of their mouths while keeping the food in their lips.
The right whale, the minke whale, the fin whale, and the sei whale all have baleen plates. All of them consume krill, but in addition to that, their diets may also contain other marine organisms, such as copepods, crabs, and fish of a smaller size. Herring and anchovies are two examples of schooling fish that can be aggressively hunted for by humpback whales and Bryde’s whales respectively.
Dolphins belong to the group of toothed whales known as Odontoceti and spend their days in the ocean searching for prey such as fish and squid to eat. © Joost van Uffelen /Shutterstock. com
How much sperm does a whale produce at once?
When it comes to the humpback whale, for example, this competitiveness occasionally manifests itself in the form of vicious combat. The competition between male blue whales for the company of a female is known as the “rumba.” In point of fact, a blue whale’s ejaculation may create around 20 liters of sperm with each release.
Do whales eat other whales?
What Kind of Food Do Toothed Whales Consume? – The presence or absence of teeth in a whale has a significant role in determining the kinds of foods that it consumes. Because they have teeth that allow them to devour bigger whale prey, toothed whales are noted for being energetic hunters.
The vast majority of toothed whales consume whale food species such as squid, octopus, crabs, and fish as their primary sources of nutrition. Other toothed whales, such as the killer whale, are known to hunt larger marine creatures, which can include whale food such as seals, sharks, birds, and even other whales.
Other toothed whales, such as the beaked whale, are not known to hunt. Killer whales are well renowned for their cooperative hunting behavior, in addition to their ability to hunt and consume prey that is larger than themselves. In the manner of a pack of wolves, they have been observed carrying out what appear to be coordinated attacks on the animals that they hunt.
- Killer whales only stray from their pod on a very infrequent basis, such as when they are mating or, in certain situations, when they are searching for food.
- Aside from that, the majority of their life is spent cultivating incredibly close relationships inside their families.
- The killer whale is not the only type of toothed whale that has been observed feeding in groups; other species of toothed whales have also been observed feeding in groups.
It is thought that these whales hunt together due to the fact that in certain cases they are smaller in size and also due to the fact that they have more intricate social relationships.
How much edible meat is on a whale?
My calculations are quite approximative. According to Wikipedia, a humpback whale may weigh anywhere between 25 and 30 tons on average. [Citation needed] I was unable to locate any sources for this information; nevertheless, I have read estimates that whale bone accounts for around 20% of the animal’s total weight.
- This leaves us with approximately 22 tons of muscles, internal organs, and blubber.
- And if whale is the only thing they consume, they are going to have to eat the gross things, some of which may even have to be eaten raw, in order to get enough of the vitamins and trace elements that they require.
- Estimating how many calories are in a whale is now the most challenging component of the process.
I was unable to locate accurate information on humpback whales. (The following information pertains to the several species of whales: Nutritional Value of Whale Meat) As can be seen, the range goes from the 110s for lean meat to the 400s and 500s for fat and other organs found within.
I’d say that comes out to 190–200 kilocalories for 100 grams of ‘typical’ whale product. That would give us around a kg of edible whale meat and other yucky stuff per person, which would be plenty to keep them alive and active enough to kill the next whale. When we divide 22 tons by 365 days, we obtain an average of 60 kilograms of whale meat every day.
If they are willing to consume the whale in its entirety, an average whale has the potential to provide food for sixty people per year (this number could be lower depending on whether or not I overestimated the total mass of edible portions or the average caloric value).
This is assuming that I did not make any errors in any of the steps of the calculation. UPD: If you’re based them on indigenous inhabitants of the Arctic, keep in mind that most of those communities spend the entire year actively searching for food. They will most likely not rely on a single dangerous hunt every year; instead, they will fish virtually frequently, harvest berries and roots, and even eatable lichens.
Additionally, they will hunt birds, seals, and whatever land animals there are (white bears, different kinds of deer). If that is how they conduct their lives, you will need to alter the estimate such that it is at least two times higher.
What are whales favorite food?
Krill, fish, zooplankton, phytoplankton, and algae are some of their favorite foods to consume. The term “skimmer” refers to some whales, such as the right whale. These whales move slowly through the water with their enormous mouths wide so that they may consume big quantities of food and water.
How much do killer whales eat a day?
Orcas are predators that feed on a wide variety of marine life, including fish, walruses, seals, sea lions, penguins, squid, sea turtles, sharks, and even other types of whales. An ice floe that is drifting in the frigid seas of the Arctic is broken apart by six tons of raw force.
- The seal that is currently resting on top of the ice does not have a chance of survival.
- After being thrown into the water, the seal is eaten by a massive orca, also known as a killer whale.
- This whale is considered to be the most dangerous predator in the ocean.
- Orca is the common name for this animal (Killer Whale) Orca, also known by its scientific name, Orcinus.
Category: Mammalian Diet: Carnivore Name of the Group: Pod In the wild, the typical lifespan is between 50 and 80 years. Size ranges from 23 to 32 feet. Up to 6 metric tons in weight Orcas are known to prey on a wide variety of marine animals, including fish, walruses, seals, sea lions, penguins, squid, sea turtles, sharks, and even other species of whales.
Their food changes with the seasons and the environments in which they live; for example, some orcas consume more fish and squid than they do seals and penguins. Orcas of an average size may consume around 227 kilograms (500 pounds) of food per day, regardless of which ocean they are in or where they are located.
Orcas have a wide variety of hunting strategies, and one of them is known as “bumping seals off the ice.” Orcas, who are sometimes referred to as the “wolf of the sea,” are social marine mammals that live and hunt in groups called pods, which are quite similar to packs of wolves.
As they hunt, they cooperate with one another. Orca pods will work together to corral schools of fish into a smaller area so that the prey may be more easily consumed. They will also smack their tails against the surface of the water, which will cause a wave that will sweep their prey, such as sea lions or penguins, off of the ice floes and into the ocean.
When they encounter a bigger animal, such as a blue whale, a pod of whales can sometimes band together to protect it. They will pursue it, bite it, and wear it down until it is ready to be consumed as food. Orcas have around 45 teeth, and the length of each tooth is approximately 3 inches (or 7.6 cm).
These teeth are designed to rend and shred flesh off their prey. Orcas do not chew their food before swallowing it. They are able to consume tiny seals and sea lions in their whole. The prey is consumed by the orcas as it glides down their throats! Larger prey are often consumed piece by piece. Orcas’ distinctive coloration may provide them an advantage when it comes to sneaking up on and killing their prey.
The color of their tummies is white, while the backs of their bodies are black. Because of the black coloration of the whale’s back, other animals that are higher up and looking down on an orca from above, such as a seal on an ice floe, may not be able to see the whale.
On the other hand, the whale’s underbelly is white, so it blends in with the light that is reflecting off of the water’s surface and into the ocean, making it difficult to notice from below. Orcas are so adept at blending in with their surroundings that their potential prey—fish, penguins, or seals—are likely to be unaware of the threat that is approaching them.
This demonstrates, once again, that the killer whale is the most expertly engineered predator in the ocean.
How much does a humpback eat a day?
Megaptera novaeangliae Status: Endangered Description The humpback whale is a type of baleen whale that is a favorite among whale watchers due to the numerous aerial displays that they put on. They are frequently observed breaching (jumping out of the water) or slapping the surface of the water with their pectoral fins, tails, or heads.
- Breaching is when they jump completely out of the water.
- The whales are generally gray in color, and their weights range anywhere from 50,000 to 80,000 pounds (22,000 and 36,000 kilograms).
- It is possible for the body of a humpback whale to reach a length of up to 60 feet (or 18 meters), with females developing somewhat longer than males.
Range Even though humpback whales are capable of traveling to every coastline in the United States, only Hawaii and Alaska have big populations of humpback whales that show up on a consistent basis throughout the year. The seas surrounding the Hawaiian Islands are home to Pacific humpback whales from the months of December through March.
- They get their food and have their young on the warm shoreline.
- One may observe a humpback whale from the shore if the weather is clear and they have a good set of binoculars.
- During the winter months, visitors to any of the Hawaiian Islands may look out to sea and spot humpback whales.
- The seas around the Big Island, Maui, Kauai, and Oahu that are up to 600 feet deep have been designated as the Humpback Whale Marine Sanctuary.
During the summer months in Alaska, the entire southern shore is the best place to spot whales. Diet Each day, humpback whales have the capacity to consume up to 1,360 kilograms (3,000 pounds) of food. The majority of the diet consists of very small crustaceans (like krill), plankton, and fish that are quite young.
- The course of a life The group of humpback whales that live in the Pacific Ocean starts its annual migration to summer feeding grounds around 3,000 miles off the coast of Alaska at the beginning of spring.
- It is one of the longest migrations ever recorded for any kind of mammal.
- After spending the summer feeding in the waters surrounding Alaska, humpback whales will begin their journey back to their wintering grounds in Hawaii.
They may survive for months without eating, subsisting only on the fat reserves they have stockpiled. Conservation The federal government has designated the humpback whale as an endangered species. Some of the dangers that these whales face include becoming entangled in fishing gear, being hit by ships, being harassed by whale watchers, having their habitat destroyed, and being harvested.
How big of a fish can a whale eat?
The mouth of the humpback whale is one of the largest found on any animal on the world, and its hunger is just as large. According to a new research, the massive animals, which are about the size of a bus, lure large quantities of fish to themselves so that they may consume as much as 2,500 kilos of fish in a single day.