Tuesday, December 13, 2011

Life of Fangtooths

Life of Sea | Fangtooths (Anoplogaster cornuta) | Fangtooths are beryciform fish of the family Anoplogastridae (sometimes spelled "Anoplogasteridae") who live in the deep sea. The name is from Greek anoplo means "unarmed" and gaster means "belly". With a Circumglobal distribution in tropical and temperate waters cold, the family contains only two very similar species in a genus with no known relatives: the common fangtooth fish, Anoplogaster cornuta, found worldwide, and shorthorned fangtooth fish, Anoplogaster brachycera, found in tropical waters of the Pacific and Atlantic Ocean. 
Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Actinopterygii
Order:     Beryciformes
Family:     Anoplogastridae
Genus:     Anoplogaster
G√ľnther, 1859
Species:     A. brachycera
A. cornuta

The Fangtooths fish has the largest teeth of any fish in the ocean, in proportion to body length. The young are morphologically very different - unlike adults, they have long spines on the head and preoperculum, larger eyes, a functional gas bladder, long and slender gill Rakers, much smaller and can be pressed teeth, and a light gray color. These differences when the two life stages should be regarded as separate species, with one in another genus is caused Caulolepsis.While understandably named for their disproportionately large, Fang-like teeth and unapproachable face fangtooth fish are actually quite small and harmless to humans : the larger of the two species, the common fangtooth fish, reaching a maximum length of only 6 cm, the short thorn Fangtooths fish was about half this size.
The head is small with a big mouth and looks bewildered, filled with mucus cavities delineated by serrated edges and covered with a thin skin. The eyes are relatively small, high on the head, the whole head is dark brown to black and strongly laterally compressed, deep furrows and gradually thinner towards the tail. The fins are small, simple and cowardly, the scales are embedded in the skin and the shape of thin plates. As compensation for reduced eyes, the lateral line is well developed and appears as an open slot along the flanks.
Pelagic Fangtooths are among the deepest-living fish as far as 5,000 meters down found. They are more commonly found among the 200 - 2000 meters, however, and apparently people stay in the upper reaches of this series. They can undergo Diel migrations as is common with many deep-sea fish: by day these fish remain in the gloomy depths and towards evening they rise into the upper layers of the water column to feed by starlight, returning to deep water by daybreak . Fangtooth fish can form small schools or go alone. They are supposed to use to contact chemoreception to find prey, relying on luck to bump into something edible.
The smaller teeth and longer gill Rakers of juveniles suggest they feed primarily by filtering zooplankton from the water, while deeper living adults target other fish and squid. The fangtooth fish 'oversized teeth and mouth are a common feature among the miniature beasts of the deep, thought to be an advantage in these lean waters where anything found to be (even if it is larger than the fish) should be considered as a potential meal. The fangtooth fish in turn attacked by other large pelagic fish such as tuna and marlin. 
Fangtooths are known as robust compared to many other deep sea fish, they are kept alive for months in the aquarium when the circumstances are very different from their usual deep-sea habitat. Fangtooth fish have planktonic larvae and are considered non-Guarder, spawning frequency and time are not sure. The youth of the common fangtooth fish begin to mature form of about three inches in length, at which point they begin to descend into deeper water. Beginning of the term is not known, but often fangtooth fish are known to mature at 6 inches. They are probably slow-growing, like most deep sea fish.

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