The fastest animals in the ocean

 Wahoo 

The wahoo (Acanthocybium solandri) lives in tropical and subtropical waters in the Atlantic, Pacific and Indian Oceans and the Caribbean and Mediterranean Seas. These slender fish have a bluish green back, and light sides and belly. Wahoo ​grow to a maximum length of about 8 feet, but they are more commonly about 5 feet long.

The wahoo's maximum speed is said to be around 48 mph. This was confirmed by scientists who studied a wahoo's speed, measured a wahoo's bursts of swimming speed, results varied from 27 to 48 mph.

Marlin

Marlin species include the Atlantic blue marlin (Makaira nigricans), black marlin (Makaira indica, Indo-Pacific blue marlin (Makaira mazara), striped marlin (Tetrapturus audax) and white marlin (Tetrapturus albidus. These fish can be easily recognized by their long, spear-like upper jaw and tall first dorsal fin.

This BBC Video says that the black marlin is the fastest fish on the planet. This information is based on marlin caught on a fishing line — the marlin is said to be able to strip line off a reel at a rate of 120 feet per second, which would mean the fish is swimming 80 miles per hour. This page lists the marlin (genus) as capable of leaping at 50 mph.

Swordfish

Swordfish are a popular seafood and another fast-leaping species, although their speed is not well-known. A calculation supposedly determined that they could swim at 60 mph, and some findings claim speeds of 130 kilometers per hour, which is about 80 mph.

The swordfish has a long, sword-like bill, which it uses to spear or slash its prey. They have a tall dorsal fin and brownish-black backs with a light underside.

Sailfish

Many sources list sailfish as the fastest fish in the ocean. These fish are definitely fast leapers and are likely one of the fastest fish at swimming short distances. The ReefQuest Centre for Shark Research describes speed trials in which a sailfish was clocked at a speed of 68 mph while leaping.

Sailfish can grow to about 10 feet long. These slim fish can weigh up to about 128 pounds. Their most noticeable characteristics are their large first dorsal fin (which resembles a sail) and their upper jaw, which is long and spear-like. Sailfish have blue-gray backs and white undersides.