Sunday Sketch: Convict Cichlid

Did you know that the convict cichlid (Amatitlania siquia), a monogamous fish species that forms long-lasting pairs, can exhibit pessimism? In a recent study, female fish selected male partners and were then paired with preferred or non-preferred partners. The fish that were paired with non-preferred partners did not spawn as quickly as the others. Furthermore, scientists tested both groups of female fish and found that the females assigned a non-preferred mate showed pessimistic bias, suggesting that they may be in a negative affective state. The lead author likened pessimistic bias to seeing the world from a “glass half empty” point of view.

Sketch contributed by Karli Chudeau and fact contributed by Lindsey Broadus

Sources: Laubu, C., Louâpre, P., & Dechaume-Moncharmont, F. X. (2019). Pair-bonding influences affective state in a monogamous fish species. Proceedings of the Royal Society B: Biological Sciences. 286.

Sigal, S. (2019, July 20). Breakups really suck, even if you’re a fish. Retrieved from

One Comment Add yours

  1. This is so interesting


Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s