Type of feed fish are divided into four groups:
– benthos feeders — fish, feeding on small organisms living on the bottom or near the bottom (benthos), sturgeon, grayling, bream, ruff, etc
– planktology — fish feeding on organisms living suspended in the water column (plankton), Zope, sabrefish, bleak, verhovka, etc.
– mixed feeding — fish feeding on organisms such as benthos and plankton, — roach, bream, IDE, Dace, etc.;
predators — fish that feed on other fishes or animals of their own species — pike, pikeperch, perch, Chub, burbot, catfish, trout, salmon of the Danube. Continue reading
Alectis albacore (Alectis ciliaris; international name African pompano; English name – thread-finned trevally) fish or a philosopher. This original and unusual representative of the family Lavrinovich widely distributed in subtropical and tropical waters of all oceans; primarily dwells among the coral reefs of the Indian and Western Pacific ocean.
Covered with small scales, or even “naked” body of a fish-philosopher has a rhomboidal shape and strongly compressed laterally. Subspecies of alectis that can be bred in captivity, can reach a body length of 50 cm in the oceans as maximum body length of these fish is 150 cm Color is a cold color scale: upper body colour is dark blue, below silvery; on the sides there are transverse stripes of dark metallic colors, and at the base of the longest rays is a small blue-black spots. The caudal peduncle of the fish-philosopher short, thin and ends with seroquelcialis fin.
Young individuals are characterized by greatly elongated filiform appendages of the rays of the dorsal and anal fins; the length of these spikes can exceed the length of the body even half. Age and growth of fish, they are shortened, and then completely disappear. Continue reading
The largest animal
The largest living creature in the world blue, he’s blue, kit. It can reach a length of 33 meters, and weight — 150 tons. In 1947 in the Antarctic waters was caught a female blue whale weighing 190 tonnes. The average size of this species is also impressive: 100-120 tons weight and 22-24 meters in length. Blue whales feed on plankton.
The largest predator
The sperm whale is the largest predator on the planet. The length of the large sperm whales-the males can reach 20 meters and weighs 70 tons. In 1950 about the Kuril Islands was captured sperm whale, whose length was 20.7 meters. Females are smaller, they can grow up to 13 meters length and 30 tons weight. In the diet of sperm whales includes squid, octopus and fish. Continue reading