DOLPHINS

Although they're referred to as songs, male humpbacks technically are humming when they create their famous underwater compositions.

In the shallows of Florida Bay, the fish can be very difficult to catch. Dolphins solve the problem by creating V-shaped walls of mud,a fish trap. Caught in the jaws of the trap, the fish have no where to go, except up.

What will a group of dolphins make of the silvery rings of air produced by a bubble machine? In this video, scientists carry out an experiment that examines at dolphin play and creativity.