5. Southern Blue Fin Tuna
Also a favorite in sports fishing, the southern blue fin tuna is one of the fastest fishes in a remarkable speed of 74kph. Blue fin tuna is found in the southern hemisphere and usually caught for human consumption. It can grow up to 2.5 meters (8.2 feet) and it weighs around 400 kg (882 pounds). It has very large bones which makes it heavy.