Sailfish, The Fastest Aquatic Animal
Sailfish is the fastest aquatic animal. Even it is very difficult to measure how fast a particular fish can swim, we can only rely on rough estimates and the sailfish is undoubtedly fast. It’s predatory behavior and its body structure demonstrate its capacity for speed. Sailfish as the fastest aquatic animal are two species of fish in the genus Istiophorus, living in warmer sections of all the oceans of the world. They are predominately blue to gray in color and have a characteristic erectile dorsal fin known as a sail, which often stretches the entire length of the back. Another notable characteristic is the elongated bill, resembling that of the swordfish and other marlins. They are therefore described as billfish in sport fishing circles.
Both species of fastest aquatic animal grow quickly, reaching 1.2–1.5 metres (3 ft 10 in–4 ft 10 in) in length in a single year, and feed on the surface or at mid-depths on smaller pelagic forage fish and squid. Individuals have been clocked at speeds of up to 110 kilometres per hour (68 mph), which is the highest speed reliably reported in a fish.Generally, this fastest aquatic animal do not grow to more than 3 metres (9.8 ft) in length and rarely weigh over 90 kilograms (200 lb).
The exact function of the huge dorsal fin, or the “sail” remains to be discovered. Some of the more likely uses are that it may assist its fast turning maneuvers, increase the fish’s profile when it’s rounding up prey, act as an actual sail when the fish is at the surface and/or help warm the blood when it is exposed to the sun.
It has been recorded as reeling out 300 ft (91 m) of a fisherman’s line in three seconds. That would be faster than a sprinting cheetah, although this speed would include its leaps out of water which shouldn’t really count as swimming speed. Some estimate 60 mph (96 kph) or faster. It also has a strong backbone and a sturdy crescent-shaped tail to complete the sprinting swimmer’s body and make it the fastest aquatic animal.