Kamis, 08 September 2011

Bluntnose sixgill shark

 
Sea Zone | Bluntnose sixgill shark | The bluntnose sixgill shark is a member of the family Hexanchidae. Many of his relatives are extinct. The organisms that are genetically closest to the dogfish, the Greenland shark, and six and seven-gilled sharks. There is more closely related relatives in the fossil as a living being. Some of the shark family come from 200 million years old. This shark is a remarkable both for its primitive types and actual physical properties.
Skin color ranges from brown to dark brown or black like. It has a light side line on the sides and on the fins' edges. The dark spots are on the sides. The general body shape is a hard, strong body with a broad head with small eyes. The students are black and the eye color is a fluorescent Blue-green. As an adult, the bluntnose sixgill shark can grow to enormous size. true body length is determined by the sex of the individual. Men usually average 309-330 cm. Women tend to be greater, on average, between 350 and 420 cm. This shark can reach a length of up to 550 cm.
The shark resembles bluntnose sixgill many fossil sharks from the Triassic. This could be because there are a greater number of Hexicanus relatives in the fossil record, as there are still alive today. They have a dorsal fin located near the tail fin. The pectoral fins are broad with rounded edges. There are six gill slits, which gives the shark its name. The most common sharks have 5 gill slits only today.
This type usually inhabits depths of more than 90 m (300 ft), and has recorded as deep as 1875 m (6150). Like many deep-sea creatures, the shark bluntnose sixgill known nocturnal vertical migrations (surface travel was at night, back into the depths before dawn) to take over.
The bluntnose sixgill shark can be at a depth of 30 m (100 ft) and shallow seen during parts of the year in certain places, such as Flora Islet, near Hornby Iceland, sightings during shallow dives at night Whytecliff Park West Vancouver, British Columbia, in Puget Sound , Monterey Canyon in Monterey, California, and in the fjords of Norway. The deepsea sharks are sharks, but like most fish, which prefer the deep, they come to the shallower depths to feed.

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