Most people know that electricity and water don’t mix, but it’s not a problem for fish that produce their own electricity. The best-known electric fish is probably the electric eel, but it is far from the only “shocking” creature underwater. In fact, the electric eel, a single species that dwells only in the rivers of South America, is outnumbered by more than 60 species of electric rays that live in the oceans.

Seahorses and pipefish may be beautiful and graceful creatures, but they’re not the speediest of fish. In fact, they swim more slowly than most marine animals, yet they manage to catch some of the fastest prey in the sea nearly every time. Their secret weapon? Seahorses use their unusually shaped heads.