Fish.

Fish are friendly animals. Some fish live in the water, but some do not, just like mudskippers. Mudskippers spent most of their time out on the mud flats, where it build garden walls. Fish don't have legs, arms, or wings. Instead, they have fins. The tail fin is used for power, and the pectoral fins for steering. the dorsal fin on the back stops the fish from rolling over the water. Some eat other fish. Many feed on plankton - tiny planets and animals that float in the water. I have five fish, do you have any fish?