is a water mammal, and it is the largest known mammal, vertebrate, and animal known in the world. Whales belong to the rank of whales, which include in addition to whales, dolphins, and porpoises. The whales are descendants of wild mammals and are believed to be of the degree of hoofs, and they moved to the water 50 million years ago.
- The whale has the distinctive characteristics of mammals: it is a hot-blooded person, and there is hair, albeit a little, as it reproduces by birth, and the young mother is breastfed, and his heart consists of four rooms, and the air is breathed by the lungs, but at the same time it may be adapted to swim and live in the water So its body is smooth, with front and tail fins, and most whales have dorsal fins.
Types of whales:
Whales are divided into two major groups:
- Toothed whales: They are scientifically known as (Odontoceti), and their types include amber whale, dwarf amber whale, white whale, and others.
- Baleen whales are known scientifically as (Mysticeti), and there are plates in their mouth instead of teeth, and of its types, blue whale, fin whale, Sai whale, postal whale, Uomura whale, humpback whale, gray whale, minke whale, etc. .