Thursday, November 22, 2012

Epaulette Shark

 Life of Sea | Epaulette Shark  | Epaulette shark (Hemiscyllium ocellatum) is a species of carpet shark longtailed, Hemiscylliidae family, found in shallow, tropical waters of Australia and New Guinea (and possibly elsewhere). The common name of this shark comes from the place, a huge black and white-margined behind each pectoral fin, reminiscent of military epaulettes. A small species usually below 1 m (3.3 ft) long, epaulette shark has a slender body with a short head and a wide, paddle-shaped fins pairs. The rod tail (the tail fin is attached) made up more than half the length of the shark. Adults are light brown above, with dark spots scattered and unclear saddle.
Sharks have lean body Epaulet allowing them to swim among coral branches and wriggle into crevices narrow reef at night they hunt for prey. Cream colored body covered with shark brown dots a lot and, on top of the pectoral fins, two large black spots (ocelli). They look like spots ornamental epaulettes on a military uniform name the shark. Predator hovering over the shark could easily mistake the place for a fish eye larger, more dangerous and ran to seek smaller prey. Muscular pectoral fins enable this shark to "walk" along the sea floor. When disturbed, instead of swimming out of danger, sometimes quickly "runs" away.
Epaulette sharks have nocturnal habits and frequent shallow water on coral reefs or in tidal pools. These sharks have evolved to cope with severe oxygen depletion night (hypoxia) in isolated tidal pools by increasing blood supply to the brain and selectively turn off non-essential functions of the nerves. It is able to survive complete anoxia for an hour with no ill effects, and at a much higher temperature than most other hypoxia-tolerant animals. Instead of swimming, epaulette sharks "walk" with their bodies writhing and pushing with their fins attached.
These species eat a variety of small benthic invertebrates and fishes. Epaulette sharks are oviparous, with pairs of female depositing an egg capsule approximately every 14 days from August to December. Because of their hardiness and small size, epaulette sharks were popular with the public and in the home aquarium. International Union for Conservation of Nature (IUCN) has assessed this species at Least Concern, because outside of a small aquarium trade is of little interest to fisheries

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