The most popular types of aquarium fish
The aquarium comes to life and brings enjoyment and pleasure only when there are fish. Fish differ from each other in their varied coloration, behavior, character. Each fish knows his…

Continue reading →

The trotline for catfish "domovnik".
One of the most fascinating objects to catch is the catfish is a large fish that lives mainly in the deltas and priustevyh spaces of rivers in the basins of…

Continue reading →

WHY sharks rarely get sick?
Powerful, swift, and deadly rulers of the seas – sharks – can cause conflicting emotions, people. Primal fear, and sometimes disgust in an incredible way combined with admiration and a…

Continue reading →

age

1 9 10 11

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

1 9 10 11
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…

...

Fish or fishes?
Fish enliven the garden pond and justify their presence in it that eat mosquito larvae and other insects. However, the presence of fish in the pond is desirable, but not…

...