I was watching River Monsters last night and saw that Sailfish can get up to 70 mph in the sea ! Did you know that? What's the second fastest fish?

Damn that thing looks kinda scary ! If you add in the speed especially.

Here's an article I read entitled: Speedsters of the Sea:

The streamlined shape and smooth skin of dolphins minimize friction in the water. Speedy and graceful swimmers, these small whalelike mammals are able to make sharp turns and sudden stops. They swim by moving their tails and rear parts up and down, displacing large quantities of water. They evidently zip through water at around 25 miles an hour, but one dolphin was seen to zigzag in front of a ship traveling at 37 miles an hour.

Sharks may appear to be slow-moving creatures, for example, when they look around for a bite to eat. But if the need arises, they put on a sudden burst of speed, the mako shark reaching a top speed of about 35 miles an hour. Experiments with a blue shark indicated that it could, in a short burst of speed, reach 43 miles an hour.

“One of the most perfect streamlined contours known”—this is how the tuna fish has been described. Designed for swift travel, the tuna’s sleek body slips through water with a minimum of effort. Evidently tuna can travel at around 40 miles an hour. And how they love to travel! A bluefin tuna was tagged by scientists off Cat Cay in the Bahamas. It was caught off Bergen, Norway, 122 days later—some 5,300 direct miles away!

The octopus, crawling on the sea bottom with its tentacles, is not usually viewed as a speedster. But if the octopus sees danger, it makes a jet-propelled get-away. Filling its thick muscular mantle with water, this living jet expels the water through a movable funnel that can be turned in any direction. Away it goes! Said a pearl diver of the South Pacific about the giant octopus: “With a powerful effort he can shoot himself backward like a rocket, 50 to 100 feet, almost faster than the eye can follow. It is a tiger’s spring, the fastest movement I have seen in the water world.”

Like the octopus, the squid is an amazing speedster of the sea. When squids want to go somewhere in a hurry, they simply do as many humans—they go by jet. In fact, speed is the specialty of these ten-armed creatures, which may reach a length of sixty feet. Despite all their arms, squids have a streamlined shape. A rocket par excellence, a squid can change direction instantly, jetting up and down, forward and backward, the latter being their usual mode of travel.

Most speeds calculated for the sailfish are based on fishing line run out, and as such are often taken for when the sailfish breaches. It's not thought likely (unless opinions have changed in the last year or two) that such speeds are possible swimming underwater.

It's still bl**dy quick though......