The ten most ferocious ancient fish are the great white shark, bull shark, tiger shark, blue shark, gar crocodile, six-barbed catfish, arapaima, black piranha, Amazonian catfish, Nile bass catfish.
Among them, the great white shark is the most ferocious, also known as the man-eating shark. It is one of the ten largest fish in the world. Their length can reach 8 meters and they are very ferocious. They feed on a variety of fish on the seafloor and can attack boats and humans.
Typically, larger individuals travel long distances across ocean basins. Two sharks were observed cruising in open water, apparently without feeding, showing a strong upward trend as they slowly but steadily descended. Swimming may also involve pursuits on cshort high-speed distances and even rapid sprints from water, and patterns of swimming and abundance in some areas appear to be linked to seasonal changes in surface temperatures.
Life habits
The man-eating shark is a large predator active during the day. Predators of various fish, sharks, rays, cephalopods, crabs, seabirds, turtles, seals, dolphins, whales, animal carcasses, etc., there are records of attacks on ships and humans. Its most important prey are marine mammals, including seals, sea lions, elephant seals, dolphins, and fish, including sharks and squid. Marine reptiles are occasionally eaten, but seabirds and sea otters are not.
A behavioral pattern known as “repetitive aerial mouth opening” has been observed in sharks from southern Australia. The shark's head is not in the water, its mouth is on or above the surface, and its side is visible. . Rolling, opening and closing the mouth in slow, rhythmic local cracks while swimming slowly on the surface of the water. The most significant difference between this behavior and normal terrestrial foraging is that repeated aerial mouth openings are not directed toward food or possible targets.
The Chinese sturgeon will not die when it encounters an alligator lizard. The Chinese sturgeon is a fish of the class Acipensidae and the class Acipensidae. Common individuals measure 0.4 to 1.3 meters in length and weigh between 50 and 300 kilograms; the largest individual is 5 meters long and weighs up to 600 kilograms. It is the largest fish in the Yangtze River in China, so it is known as the "king fish of the Yangtze River". The body is fusiform, with a poi headntue and a long snout.
The Chinese sturgeon is a bottom-dwelling fish with a very narrow feeding behavior. It is a carnivorous fish and feeds mainly on certain small or slow-moving benthic animals. In the ocean, it feeds mainly on fish. The categories follow, with fewer molluscs.