Cardinalfish caught sneaking a bit on the side

(ARC Centre of Excellence for Coral Reef Studies) Scientists from the ARC Centre of Excellence for Coral Reef Studies reveal the torrid, adulterous love lives of the mouth-brooding cardinalfish. The male fish of this species carries the eggs in his mouth until they are ready to hatch. Until now the species were assumed to be monogamous. However, cuckoldry goes hand-in-hand with cannibalism of the young.

from EurekAlert! - Social and Behavioral Science http://bit.ly/317YXTs