National Science Foundation: Waterfall Climbing Fish Performs Evolutionary Feat

The species of Goby fish, Sicyopterus stimpsoni, also known as the "inching climber," thrives in the waters off Hawaii. To reach its freshwater spawning area, it must scale a waterfall, hundreds of feet high, using suction cups on its body to hold onto the rocks. Scientists study these fish to better understand how adaptation occurs over long and short periods of time. [3:08]