The Astyanax microschemos lives in the benthopelagic, freshwater environment.
Astyanax microschemos has a massive head, shallow body, short snout and a vertically-elongated black humeral spot, which is a characteristic of the members of the Astyanax scabripinnis group. More
Astyanax microschemos has a massive head, short snout, usually smaller than the orbital diameter, shallow body depth, and vertically-elongate humeral spot that serve to include it in the A . scabripinnis species complex. A comparative synopsis of this complex is provided. More