Most sharks eat fish. Large sharks eat sea lions（海狮）, dolphins, and other sharks. These large sharks have very sharp teeth. The te

鲨鱼 海狮 shark 鲸鲨 sharks 2025-09-19 18:04  4

Sharks are fish, but their skeletons are made of cartilage（软骨） instead of bones. Cartilage is what gives human ears their shape. U

阅读 鲨鱼 shark 背鳍 sharks 2025-09-17 18:00  4