Fish just want to have fun, according to a new study that finds even fish 'play'

Biologists have documented fish playing with a bottom-weighted thermometer and other objects. Play, like much of animals' psychology including emotions, motivations, perceptions and intellect, is part of their evolutionary history and not just random, meaningless behavior.

Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/P...