There are hundreds of animals in a tide pool. Let me tell you about some. Mussles and starfish live on rocks by tide pools. They have a suction that clings them to the rocks. Their instincts tell them about the safety that it supplies.
Hermit crabs have unusual homes.
Just like a turtle and a snail, crabs live in shells. Each crab starts off in one snail shell and then moves on to a larger vacant shell when it needs more space. Some hermit crabs walk around with Sea Anemones on their shells. This is an advantage to both animals. The Sea Anemone provides protection with its stinging tentacles for the crab from predators.