People often refer to beasts as animals. In fact, among beasts, there are not only those that can fly and glide like bats and flying squirrels, but there are also many animals that live in rivers, lakes or oceans. beast.

The vast ocean is the cradle of life. It is not only a vast world for fish, shrimps, crabs and other marine life to roam, but it is also a good home for sea beasts to live and reproduce.

Whales are giant beasts living in the ocean. Although it looks like a fish and is a fast-swimming animal in the sea, it is actually a mammal that breathes with lungs and gives birth to live babies. Whales are generally divided into two categories: baleen whales and toothed whales. ***There are more than 90 kinds. The largest of the baleen whales is the blue whale, which is more than 30 meters long and weighs more than 100 tons. It's heavier than 40 elephants. The most ferocious of the toothed whales is the killer whale. It will eat almost anything, and it will even dare to attack blue whales that are ten times larger than itself. Dolphins are the little brothers of the cetacean family. It is not only the swimming champion among sea beasts, but also a smart sea beast. After training, it can perform wonderful shows.

Sea lions, seals, walruses, fur seals and manatees are also animals that live in the ocean. In addition to manatees who cannot live ashore, sea lions, seals, fur seals and walruses all sleep and breed on the shore. Sea lions are so named because they have a lion-like face, a long mane on their neck, and a roar like a lion's roar. They live in groups on the beach, go to the sea to hunt during the day, and come ashore to sleep at night. Male sea lions often fight for females, and they won't stop until both sides are scarred and one party admits defeat. Sea lions are smart and flexible, and after being domesticated, they become good performers in the circus. Walruses have tusks like tusks on their mouths. They use their tusks as weapons to hunt prey, and use their tusks to compete for territory and resist attacks from white bears.

Although sea lions, seals, walruses and fur seals have different appearances and body sizes, their limbs have all evolved to be very short, like fish fins, which is the result of their long-term amphibious life.