A top freestyle swimmer achieves a speed of only 4 miles per hour. Fish, in contrast, have been clocked at 80 mph

The black marlin (Istiompax indica) is a species of marlin found in tropical and subtropical Indo-Pacific and east Pacific oceans from near the surface to depths of 915 m (3,002 ft). It is a large commercial game fishwith a maximum published length of 4.65 m (15.3 ft) and weight of 750 kg (1,700 lb). It is one of the largest marlins and bony fish. This marlin is one of the fastest fish on earth reaching speeds up to 80 mph (130 km/h). This fish is highly prized if caught.