The blind side of a Remo flounder's head as it was being dissected Paulo Presti When ichthyologist Paulo Presti, a graduate student at the University of São Paulo in Brazil, found a jar containing a ...

Research on fossilized fish from the late Devonian period, roughly 375 million years ago, details the evolution of fins as they began to transition into limbs fit for walking on land. Much of the ...

To female molly and Limia fish, nothing is hotter than a male with a large dorsal fin. But these fins aren't just decorations to attract females. Males also use them to fight or intimidate rivals. For ...