The gender differences in the genus Herichthys are also quite obvoius


Above are 2 femal Herichthys carpintus, note the dark are in the dorsal, and slope of the crainal profile.
Below a male, lack of dark color in the dorsal, and steeper crainial profile


Even as 1¨juvies the profile difference in males as females is apparent

I find the crainial profile is obvious in other Herichthys


Male H bartoni left, female right (above)
This cranial profile is obvious in other genera

Female Nandopsis tetracanthus above
male below
Mesoheros festae cranium differences can also be dramatic

Male above, female below
