Contact: Kelly Blake
University of Maryland
Caption: Except for the loss of eyes and pigment seen in the cave-dwelling form, the surface-dwelling (at top) and cave-dwelling fish (at bottom) are hard to tell apart. You can study evolution very nicely if you have both the ancestral and derived forms of evolving animals.
Credit: Masato Yoshizawa
Usage Restrictions: Credit: University of Maryland, Masato Yoshizawa.
Related news release: Adapting to darkness: How behavioral and genetic changes helped cavefish survive extreme environment