Sharks
Sharks are one of the most formidable inhabitants of the ocean. The lack of bone tissue and Gill covers, especially the structure of scales, and many other features of the…

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North American catfish thronging fishes of the Kuban
North American catfish, introduced 30 years ago in Krasnodar region, thronging fish-natives, including our native European catfish. American channel catfish was brought in a fish farm of the Krasnodar territory…

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Fishing for predatory fish
Walleye is a fish that belongs to the family percidae. The weight of this large predator in good conditions can reach 20 pounds. And at length it can grow up…

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Sharks

Sharks are one of the most formidable inhabitants of the ocean. The lack of bone tissue and Gill covers, especially the structure of scales, and many other features of the structure speak of their ancient origin, as confirmed by paleontological data the age of the first fossil remains of sharks is determined approximately 350 million years. Despite the primitiveness of the organization, shark — one of the most perfect predatory fish of the ocean.

Over a long period of existence they managed to adapt perfectly to life in the water column and now successfully compete with bony fish and marine mammals. Unlike bony fish sharks and rays don’t spawn and lay their large, covered with a Horny shell eggs or give birth to live young.

The highest values reach whale (up to 20 meters) and the so-called giant shark (up to 15 meters). Both these and others, like baleen whales, they feed on planktonic organisms. Wide and gaping jaws, these sharks move slowly in the midst of clusters of plankton and filter the water through Gill openings covered by a network of special outgrowths of surrounding tissue. Giant shark profiltruyte an hour to one and a half thousand cubic meters of water and remove all organisms larger than 1-2 millimeters. Continue reading

Amazing creatures of the seas and oceans
1. Spotted dolphins . Bahamas. The comment of the photographer: "Night of spotted dolphins swim from the shores of the Small Bahamian banks in the deep water of the Gulf…

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Monkfish in the aquarium
Many public aquariums in the world, including in our country contain these unusual vivid exotic fish. The angler (Antennarius maculatus) or yellow angler, monkfish, or fish-the pedestrian is more like…

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