Michael Phelps is faster than a flounder. He swims about 6 mph. But what if he was fighting currents, swimming upstream, and jumping dams? Salmon, dolphin, and blue shark are all faster. Salmon swim 8 mph. Maybe Mike could take them in a sprint. Swordfish and sailfish top the scales at 60 mph.
Jennifer Viegas’ “Born Animal” blog runs the stats at Discovery News.