Climbing perch use their pectoral fins and tail to move around on land. They also use the spines on the lower edges of their gill covers ...

Each time the tide recedes, most fish escape certain death by following the water. But not the prickleback. This uncanny eel-like fish has a trick up its sleeve — it can breathe air.

Juveniles can also wriggle their long, narrow bodies onto land, enabling them to travel ... lungfishes, and betta fish can all breathe air directly as well. These fish reach sexual maturity ...