Astyanax jordani

As the name suggests, this fish is blind. Can you guess why
Due to living in lightless waters, such as stalactite caves, where light only very rarely penetrates, both the pigments and the eyes of these fish have receded. Because the pigments have almost completely receded, the cave tetra appear white.
However, because not all cavities are completely dark, there are gradations in pigment and eye reduction.

About Astyanax jordani