Big catfish weigh over a hundred pounds, and fish weighing thirty to forty pounds are not uncommon.
There are people the idea that som fish dirty, eats only carrion. No, catfish is a predator. Yes any and its main prey — fish. Do not hesitate to take it and frogs, leeches, crayfish and river shells, with pleasure eats any animals trapped in the water. Often had to meet som floating birds in the stomach. Although likely, the fish were caught by hunters wounded weakened birds. But on any other river you will hear stories about the huge predators living here in this concrete pit and simply packs feeding domestic geese and ducks.
Beginning with the warming water catfish actively feed on fish, especially the ROE ceiling. Thus, reward yourself for a long post.
A predator usually hunts from an ambush without attacking actively, as perch or pike, and just sucks in the little thing swirling around it. It is equipped with magnificent control devices — mustache. Thanks to them he can find food and darkness, and even in very dirty water. And if it does reciprocos, lightning-fast and very short, never the pursuit of prey after a miss. Continue reading
In the World ocean inhabits 180 thousand kinds of animals
According to scientists, man eating fish and other marine animals that uses only 0.02% of the primary production of seas and oceans.
Blood pressure in arthropods 5-10 mm Hg. article on the green frog – about 40, active fish – 65-75, birds and mammals – 120-180.
In rivers of Central Europe is inhabited on average 40-50 species of fish in the Danube – about 70 species, while the Amazon is more than 1 thousand kinds of all kinds of fish.
Many animals are very demanding in terms of ambient temperature. For example, Antarctic fish Trematomus lives at water temperatures of 1.9 O. temperature Fluctuations in their habitat at all times of the year do not exceed 0.1 A. Already at +60 the fish dies. Continue reading
Today discovered and described about 30 thousand species of fish . Some of them can boast of such unusual appearance that it is hard to believe that it is really fish. Some other representatives of these aquatic vertebrates are so rare that they know very little.
The most unusual and rare fishes are often found at great depths (sometimes 300-500 meters under water) and never rise close to the surface. Underwater world conceals many mysteries, many of which have yet to be disclosed .
Blind fish, rock-climbing
Gross sticky lower surface of its large fins allows the fish to climb slippery rocks and held them in conditions of fast currents and even scrambling under waterfalls !
Catfish that lives without water
Donnadoobie from the group of sea devils have a very long lure . which can be up to 10 times longer than the body of the fish. Interestingly, all these creatures swim upside down . but so far none of the scientists really can’t say why. Continue reading