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At what speeds do fish swim?

Find out the swimming speeds of certain fish, including yellowfin tuna and trout.

The speed of a fish in the water depends on many factors, such as size, fin shape and internal temperature. [©Jupiter Images, 2009]
©Jupiter Images, 2009
The speed of a fish in the water depends on many factors, such as size, fin shape and internal temperature.

The maximum swimming speed of a fish is somewhat determined by the shape of its body and tail and by its internal temperature. The cosmopolitan sailfish (Istiophorus platypterus) is considered to be the fastest fish species, at least for short distances, swimming at greater than 60 miles (95 kilometers) per hour.

However, some American fishermen believe that the bluefin tuna (Thunnus thynnus) is the fastest, with the fastest speed recorded so far at 43.4 miles (69.8 kilometers) per hour. Data is extremely difficult to secure because of the practical difficulties in measuring the speeds.

The yellowfin tuna (Thunnus albacares) and the wahoe (Acanthocybium solandri) are also fast, timed at 46.35 miles (74.5 kilometers) per hour and 47.88 miles (77 kilometers) per hour during 10 to 20 second sprints. Flying fish swim at 40+ miles (64+ kilometers) per hour, dolphins at 37 miles (60 kilometers) per hour, trout at 15 miles (24 kilometers) per hour and blenny at 5 miles (8 kilometers) per hour. Humans can swim 5.19 miles (8.3 kilometers) per hour.

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