The Shortfin Mako is the world's fastest shark, reaching speeds up to 45 mph.

The Shortfin Mako (Isurus oxyrinchus) is widely recognized by marine biologists as the fastest shark in the ocean. While cruise speeds are lower, research from institutions like the Guy Harvey Research Institute has documented burst speeds reaching 45 mph (72 km/h). Some researchers suggest they may even reach 60 mph in short bursts. This extreme velocity is made possible by their fusiform body shape, which minimizes drag as they move through the water.A key biological advantage is their endothermic (warm-blooded) circulatory system. Unlike most fish, Mako sharks use a heat-exchange system called the rete mirabile to keep their muscles and brain warmer than the surrounding water. This allows their muscles to contract more quickly and powerfully, which is essential for high-speed predation. This adaptation is similar to that found in Great White sharks and tuna.Their skin is also a marvel of engineering, covered in tiny, tooth-like scales called dermal denticles. These structures create small vortices that reduce turbulence and allow the shark to glide more efficiently. Because of this speed, Makos are famous for their breaching behavior. They can launch themselves up to 20 feet (6 meters) above the surface, a tactic often used to surprise fast-moving prey like swordfish and tuna.