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The transparency is due to a nanoscale structure of hydroxyapatite and collagen, while the tips of the transparent teeth of deep-sea dragonfish were found to emit more red light in seawater [12] which further contributes to its transparency as red light is close to invisible at the depths that the deep-sea dragonfish reside due to a lack of ...
The largest species is the barbeled dragonfish Opostomias micripnus, widely found in the Atlantic, Indian and Pacific Oceans and measuring about 50 cm (20 in) in adult length. These fish have a highly unusual and often almost nightmarish appearance. They all have teeth on the premaxilla and maxilla.
There are also the aforementioned differences of teeth, barbel, and black vs brown color. [11] Idiacanthidae have a snout equal or less than their bony orbit length with nostrils closer to their eyes than snout. Their premaxilla, maxilla, and mandible teeth are almost all capable of being depressed. [12]
Idiacanthus atlanticus, the black dragonfish, is a barbeled dragonfish of the family Stomiidae, found circumglobally in southern subtropical and temperate oceans between latitudes 25°S and 60°S, at depths down to 2,000 metres (6,600 ft).
The large-eye snaggletooth is black in colour, up to 35 cm (14 in) in length. [8] It has 9–13 dorsal soft rays and 12–17 anal soft rays. It is identified by the lack of high arch in the photophores behind the anal base, presence of double postorbital organ and the clear separation of the dagger-like teeth in its upper jaw.
Asian arowanas bear teeth on many bones of the mouth, including the jaws, vomer, palatines, pterygoids, parasphenoid, and tongue. [8] [14] Asian arowana scales are large, cycloid, and, in some varieties, metallic-coloured, with a distinctive mosaic pattern of raised ribs.
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Stomias boa, also known as the boa dragonfish, scaly dragonfish, dragon-boa or boa scaly dragonfish, is a species of deep-sea fish in the family Stomiidae. [ 4 ] [ 5 ] [ 6 ] [ 3 ] [ 7 ] It is found at great depths worldwide in tropical to temperate oceans but is absent from the northern Pacific and northwest Atlantic Oceans .