Cooperative species, like humans, can display spontaneously prosocial behaviour. Experiments on a monogamous fish with biparental care shows that pair bonded males are prosocial to both their long-term mates and to strange females, but make antisocial choices if their mate is watching, or if another male is the potential recipient.
- Shun Satoh
- Redouan Bshary
- Masanori Kohda
