I saw this on ScienceDaily: Fish just want to have fun, according to a new study that finds even fish 'play' http://www.sciencedaily.com/releases/2014/10/141020121406.htm 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.
Experiences and insights from being around animals. "animal training" "life lessons" "behaviour" "animal welfare"