Saturday, 25 June 2016

Lemon Shark Facts That You Should Know


Lemon shark info

Interesting Facts About Lemon Sharks


You are not the only one imagining a swimming yellow lemon with teeth and fins after hearing the name lemon shark. Actually, there is not much lemon like quality in that shark except a slight lemon tint on its skin. The color was the reason behind that unusual name.

Scientists are no nonsense folk who call it Negaprion brevirostris. In fact, there are two types of lemon sharks – N. brevirosris and N. acutidens (sickle fin or sharp tooth lemon shark). There was another species (now extinct) N. eurybathrodon.

Lemon sharks are requiem sharks (Carcharhinidae) like the great white or hammerhead. That family of sharks belongs to the order Carcharhiniformes or ground sharks.

Size


Lemon sharks are generally regarded among the big and powerful sharks. The largest specimen ever was 3.43 m (11.3 ft) and 183.7 kg (405 lb). But most common size is 9 to 10 ft (2.7 to 3 m).The weight of the full grown shark is about 90 kg (200lb). Like other requiems, the female is bigger than the male.

Video: Lemon Sharks Feeding Frenzy



Anatomy

 
Lemon shark teeth
Tooth
The head of a lemon shark is flattened. There is a short and broad snout. The skin color is slightly yellow. The color helps to camouflage on the sands under the ocean.

1st and 2nd dorsal fins are almost same in size. There are other common fins like big pectoral fins and the caudal fin, smaller pelvic and anal fins.

Lemon shark anatomy
Anatomy of a Lemon Shark
There is a special organ inside their head to detect prey. That organ is called ampullae of Lorenzini. It can detect the electric field of any living animal from far.

Habitat and Distribution

 
Lemon shark distribution map
Geographical Distribution of Lemon Shark
Lemon sharks live in the shallow warm ocean waters of the tropical and sub-tropical regions. Their main concentration is in the western Atlantic from United States to Uruguay. The east coast has only limited numbers along the coast of Senegal and Cote de Ivory. Some lemons also live in the western Pacific, from Bay of California to Ecuador.

River mouths, mangroves, coral reefs and bays are the favorite habitat of the lemon shark. They does not like the open ocean and so stay within the limits of the continental slopes. The shark generally roams within the depth of 90 m (300 ft). But they can go to the open ocean only during the migration.

Breeding

Baby lemon shark
Baby lemon shark

Lemon sharks are viviparous. The egg is hatched inside the body. The mother has to carry the baby inside their body until they become more mature. After a gestation period of 9 to 10 months the mom gives live birth of 10 to 30 cubs.

Pregnant lemon shark
Pregnant lemon shark

Mangroves are their favorite nursery sites. In the site the babies are born. They live their until they become strong enough to survive in the ocean. The sharks return to the place every year during the season of giving birth.

Feeding


Lemon shark eating

Lemon sharks become active in the night in search of food. The main food item is different types of bony fishes. The shark is slow and show they prefer slower fishes. Some fishes prefer to hide themselves rather than fleeing at full speed. Lemon sharks love to find these fishes and eat them.

Lemon shark attacks fish school
Lemon shark attacking a school of fish
They also eat different types of crustaceans like crabs, shrimps and lobsters. They also eat other sea bed invertebrates like tunicates. The stingrays are also often become victim of these sharks hunger. Juveniles often eat each other for survival.

Social Behavior


School of lemon shark

Generally sharks are single animals. But lemon sharks often make big groups. There are also hierarchy in the group with leaders and followers. They can also haunt in groups with perfect coordination – which is very uncommon among sharks. When one victim is attacked by an individual, the feeding frenzy begins where many joined the party.

In fact, lemon sharks are probably smartest among all sharks. Their body to brain ratio is also higher than other sharks. The shark can learn from experience and interact with others in a group.

Interaction With and Attack on Humans


Negaprion brevirostris

Lemon shark is edible. In some regions the meat is very popular. So, thousands are killed for meat. The skin of the fish is also valuable. The fin is also used in the soups in East Asian countries. The result is overfishing of the species and steady decline of its numbers. The shark is now in the IUCN threatened list.

Lemon sharks are slow to move and non aggressive in nature. So, it is no danger to humans. Incidents of lemon shark attack on humans are rare. But it is not advisable to disturb it. Some people were bitten in the past for such mistakes. Remember it is a big shark with too powerful jaws which can result in some serious damage.

Some Interesting Facts


  • The teeth of a lemon shark are curved. The curving helps them to catch slippery prey like fishes.
  • Despite of having bog eyes, a lemon shark has poor vision. Moreover, they haunts at night when the ocean is dark.
  • The poor eyesight is compensated by a very strong nose. The shark can smell blood in the water from a few miles away.
  • The shark can live very well in aquariums. So, many aquariums have them. That has helped the experts to learn many things about sharks.
  • Parrotfish is a colorful tropical fish. It is one of the most favorite foods of lemon fish. It tries to camouflage to hide itself from the shark but almost every time fails.
  • Lemon sharks are selective feeders. They attack the medium sized fish among a group of fishes of different size.
  •  Most other sharks roll to rip off flesh from large prey’s body after a solid bite. The lemon shark is an exception; they shake their head from side to side to do it.
  • The shark lives in a group of similar size. So, bigger sharks make one group while smaller ones make another.
  • The females of the species mate with multiple males within a short period of time. Unlike other animals they do it even after pregnancy. The practice is done for not being disturbed and chased by the males.
  • Sometimes lemons sharks can go to brackish or fresh waters. They can survive for a few hours in the rivers but never go far upriver.

Conclusion


We have learned many fascinating facts about lemon sharks today. If you have read so far then you were interested to know about the shark. It is possible that you know something that I don’t know. If it is the case then why don’t you share your knowledge with me and other readers of this website?

If you think that more people should read this then help me to reach more eyeballs by sharing this article via facebook, twitter or other social media.

If you want to read more about sharks then there are some listed below for your convenience:-

Porbeagle shark
 
Nurse shark

Tiger shark

Port Jackson shark

Brown banded bamboo shark

Dogfish

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