What are some interesting mammals in the ocean?

The most common and representative marine mammal of sea lions is the whale, which has a wide variety of species, including the blue whale, which is the largest animal on the planet. In addition, seals, walruses, dolphins, fur seals, sea lions, manatees, etc. are also typical marine mammals. Among them, the dugong, also known as the "mermaid", is a type of marine mammal.

Sea otters, are the smallest marine mammals.

The walrus has a large body with sparse and stiff hairs on its thick **. They have small eyes and poor eyesight, but they have a pair of long tusks. Walruses walk, relying mainly on hind fins.

Swing your feet from front to back and pull your body forward with your long fangs pierced into the ice. Walruses live mainly by the seaside of the Arctic and sometimes make short trips to the Pacific and Atlantic Oceans. The walrus has a discolored "coat", and after soaking in the icy seawater, the color of the body will turn grayish-white due to the decrease in blood circulation of **; When on land, their blood vessels absorb heat and expand, resulting in a brownish-red body color.

Beluga whales live in the cold waters of the north and feed on crustaceans and fish. They spend most of their time at the surface of the sea or in shallow water, and prefer to live in groups. Beluga whales sometimes rely on echolocation for predation and sometimes on vision.

It is a "petite" cetacean and the only milky whale in the world. In the cetacean world, according to the type of vocalization, the humpback whale has a pleasant call, but there are not many species, killer whales can only make 62 different sounds, while beluga whales can make hundreds of different sounds. Therefore, Moby Dick has the reputation of "master of language".

Weddell seals are known as "punch experts". They can dive for up to 70 minutes, but they are constantly surfacing to breathe air. When the sea freezes, they gnaw a hole in the ice from underwater.

To prevent the hole from being clogged with ice again, these industrious Weddell seals nibble again every once in a while. Do you know the mystery of Weddell's dive seal? Now I'll take you to the bottom of the mystery:

Weddell seals have pitifully small brains, less than one-thousandth of their body weight; Brain oxygen consumption accounts for only 3 4 of the whole body in 70 minutes. At the same time, their hearts beat slowly at deep water, which also reduces oxygen consumption, which allows Weddell seals to dive to depths of more than 600 metres below the surface.

In Shark Bay in Western Australia, there is another group of bottlenose dolphins, different from dolphins in other areas, the dolphins here have evolved a unique hunting habit - because they need to use their snouts to rummage in the sand and gravel on the seabed for food, some sharp stone particles may scratch the dolphins**, in order to avoid this injury, the dolphins in Shark Bay have learned to use sponges for "labor protection", they hold the sponge on their mouths, play the same effect as labor protection gloves, and more interestingly, This extinction appears to be circulating only among female dolphins, and even if the female is willing to teach it, its male offspring seem to resist learning.

The only whale with tusks in the world is the male narwhal. The tooth is a mutated tooth that protrudes from the upper jaw and is three meters long. Tusks can be used not only to hunt prey, but also as a favorable fight** against foreign invaders.

Individual females also have tusks, but they are generally no more than a meter long.

Beluga whales, beluga bears, seals, fur seals, manatees, sea lions, dolphins, walruses, killer whales, blue whales, sperm whales, dugongs, small warm whales, horned whales, Chinese white dolphins, humpback whales x04 x03 Marine mammals mainly include cetaceans, manatees, and pinnipeds (or pinnipeds). In addition, sea otters are in the sea almost all their lives.