Ilyodon

The species name 'furcidens' is derived from the interesting fork-shaped teeth of this fish. This species may develop a cervical hump as it matures. As with other goodeids, there is less of a size difference between the sexes than in many other livebearers. This is thought to be related to the relatively primitive structure of the andropodium, as the fish tend to choose mates that are of similar size so that the sex organs are synchronised. Goodeids are unique among livebearers in t...