different species and plants, from tiny organisms like plankton to the world's largest animal, the blue whale. Deep down in the seas' depth, you will even find some monstrous-looking creatures that seem to have come straight out of a fairy tale. Did you know, for example, that male anglerfish feed on the female's blood? And is it true that the giant clam can trap a diver's leg? Or have you ever heard of fish that hitch a ride on sharks?