The pygmy shiner (Notropis tropicus) is a species of freshwater ray-finned fish beloinging to the family Leuciscidae, the shiners, daces and minnows. It is endemic to the Pánuco River basin in eastâÂÂcentral Mexico. Its type locality is TamesàRiver at Llera in the state of Tamaulipas. It is a small species, less than in standard length.