Meeting Abstract
The kribensis cichlid is an environmentally sex determined fish with two relatively well documented alternative male morphs. The red morph is more aggressive and is biased towards breeding haremically, while the yellow morph is less aggressive and monogamous. Water chemistry in the first 30 days of life influences sex ratio at adulthood. More acidic conditions produce more males and more of those males are of the red morph. A further two male colour morphs, known as blue and green, and two alternative female colour morphs, have been noted in the hobbyist literature but remain unstudied. We find these in the lab, produced by the same pairings that produce red and yellow males. Here we compare the behaviour of these different morphs.
