What are the ancestors of whales? Is a whale a fish?

Is a whale a fish? Cetaceans generally refer to cetaceans, mainly baleen whales and toothed whales. There are few baleen whales, but they are huge. At present, the smallest known species is more than 6 meters long, and the toothed whales vary greatly. The smallest species is only about 3 minutes long, and the largest is more than 20 meters.

Is a whale a fish?

Whales are not fish. Whales are about 80 species of placental mammals living in oceans and rivers, belonging to the phylum Chordata, subphylum Vertebrata, Mammalia, and True mammals. Many characteristics of completely aquatic mammals show a high degree of adaptation to life in the sea. Breastfeeding in water, all species inhabit the ocean except a few that live in fresh water.

What kind of food do whales eat?

Whales generally feed on molluscs, fish and ephemerals, and some species can also prey on seals and seals. Every once in a while, whales have to breathe. They usually swim from high-latitude cold water to low-latitude hot water to give birth in winter, and then swim back to high-latitude cold water to hunt in summer. Due to environmental degradation and massive human hunting, whale members, especially some large members, are widely hunted because of their high economic value, and many cetaceans are on the verge of extinction.

What are the ancestors of whales?

The ancestors of whales are most likely to be terrestrial hoofed animals from North America, Europe and Asia-the family Cephalidae, whose members are as small as domestic dogs and as tall as bears, but many animals have evolved from small to large, so cetaceans may have evolved from small middle claws. It is speculated that these small teeth in shallow water fishing in the middle claw gradually transformed into amphibious life, and then in the long process of evolution into today's whales and dolphins.