TRUE. Biologists recently observed male cichlids of the species Tropheus duboisi playing with specific objects in their environment. Play as defined in the field of ethology (animal behavior) is a post-natal behavior that has no apparent purpose and which may incorporate motor patterns from other contexts. As stated by Science Daily, "Play, like much of animals' psychology including emotions, motivations, perceptions and intellect, is part of their evolutionary history and not just random, meaningless behavior."