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Wednesday, June 22, 2011

The Beauty Of Flying Fish


Beauty Of Animals| The Beauty of The Flying Fish  | Exocoetidae, is a family of marine fish in the order Beloniformes of class Actinopterygii. Fish of this family are known as flying fish. There are about 64 species grouped in seven to nine genera The origin of the term "Exocoetidae" is as follows. The suffix -idae, common for indicating a family, has been placed after the root of the word exocoetus, not only the present scientific name for a genus of flying fish in this family, but also the general name in Latin for a flying fish. The Latin name is a transliteration of the Ancient Greek name ἐξώκοιτος for the flying fish, literally "sleeping outside", from ἔξω "outside" and κοῖτος "bed", "resting place", so named since flying fishes were believed to leave the water to sleep on the shore (Pliny's Natural History, vol. IX, 19).
Flying fish live in all of the oceans, particularly in tropical and warm subtropical waters. Their most striking feature is their pectoral fins, which are unusually large, and enable the fish to hide and escape from predators by leaping out of the water, taking short gliding flights through air just above the water's surface. Their glides are typically around 50 metres (160 ft).

To glide upward out of the water, a flying fish moves its tail up to 70 times per second. It then spreads its pectoral fins and tilts them slightly upward to provide lift. At the end of a glide, it folds its pectoral fins to reenter the sea, or drops its tail into the water to push against the water to lift itself for another glide, possibly changing direction. The curved profile of the "wing" is comparable to the aerodynamic shape of a bird wing. The fish is able to increase its time in the air by flying straight into or at an angle to the direction of updrafts created by a combination of air and ocean currents.
Genus Exocoetus has one pair of fins and a streamlined body to optimize for speed, while Cypselurus has a flattened body and two pairs of fins which maximizes its time in the air. From 1900 to the 1930s, flying fish were studied as possible models used to develop airplanes.

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