What's in the small pocket of the sea otter?

Once in the small pocket of the sea otter. When talking about sea otters, many people think of their cute behaviors such as rubbing their faces, holding hands to sleep, and opening stairs with rocks. But do you know that these little cuties have a magic pocket? I am different. I have magic pocket. The pockets are under their armpits. And both of their forelips have pockets under their armpits. It is easier to see by lifting their paws. It's my secret. Just keep it between you and me. This pocket is useful. The sea otters usually put some small stones inside. When the sea otter finds a sea urchin, it can use the small rock in its pocket to break the sea urchin. And after that, they won't throw away the stones but put them back in their pockets. We are environmentalists. We have to protect our environment. Sea otters will also put the remaining sea urchins in their pockets if they can't finish eating them. It's a magic pocket and also my portable refrigerator. This pocket is not small. In the aquarium, you can see the sea otters keep filling snacks into the pocket. It looks very cute. It's like Doraemon's pocket. And it's also a childcare pocket. After the mother sea otter has a baby, she can also put the cup in her pocket and take the baby sea otter around. I learned this trick from kangaroo.