Follow the whale into the bottom of the sea and write 400 words.

We are famous marine behemoths-whales. Although we look like fish, in fact, we belong to mammals like humans. Our whale family consists of two kinds of members, one is a baleen whale with no teeth in its mouth and the other is a toothed whale with sharp teeth in its mouth. I am a toothed whale and the overlord in the sea-killer whale. Although I am small in the whale family, I am the bravest one. Fish, shrimp, even sharks and walruses in the sea will run away when they see me. My home is full of warmth. When my partner is injured, we will try our best to help, push it to the surface and accompany it to a safe place. My cousin, the blue whale, is the most burly animal in the whale family and the largest living animal in the world, bigger than some dinosaurs. It looks like a hill, more than 30 meters long and weighs 170 tons, which is 30 times heavier than the largest elephant on land! We are full of treasures, and now we are on the verge of extinction due to overfishing. Alas! I really hope that human friends can treat us well. We like this beautiful and colorful world! Our brains are the largest and most complex of all animals on earth. We have a good memory and take care of each other in groups. For example, when we sleep, several partners always form a circle, with their heads inward and their tails outward to prevent other animals from sneaking up on us. Many people in my family are sea singers! For example, Moby Dick can make hundreds of sounds, and the changes of the sounds are amazing. It is a rare enjoyment to hear Moby Dick sing! We are willing to live in harmony with our human friends, and we also hope that our human friends can give us space for free activities!