How fast can fish swim?

up to 6km/h
Pacific Sailfish = 68 mph, Mako Shark = 60 mph, Wahoo = 59 mph
Mahi Mahi= 57 mph, Blue Marlin = 56 mph, Bluefin Tuna = 44 mph
Swordfish = 40 mph, Bonefish = 40 mph, Yellowfin Tuna = 40 mph
Barracuda = 36 mph, Tarpon = 35 mph, Rainbow Trout = 23 mph"