Throat phallus fish

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Throat phallus fish
Neostethus lankesteri

Neostethus lankesteri

Systematics
Spinefish (Acanthopterygii)
Perch relatives (Percomorphaceae)
Ovalentaria
Superordinate : Earfish relatives (Atherinomorphae)
Order : Earfish (Atheriniformes)
Family : Throat phallus fish
Scientific name
Phallostethidae
Regan , 1916

Throat phallus fish (Phallostethidae, Syn . : Neostethidae) are a family of very small fish that live in Southeast Asia from Thailand to the Philippines and on Sumatra in fresh waters, in brackish water and rarely in the coastal seas.

features

Throat phallus fish are only 1.4 to 4.1 inches long. Your body is covered by cycloid scales, transparent, elongated and flattened on the sides. The fish usually have two dorsal fins , the first, if present, with one or two short rays, the second with 5 to 10 soft rays. Further fin formula : Anale 13–28, Pectorale 9–13

The female animals have no pelvic fins . In the males they are transformed into a throat-like copulation organ (priapium), which is used to hold the female during mating and internal fertilization. The complex priapium contains bones, muscles, outgrowths of the kidneys and gonads, as well as parts of the intestine . The males are asymmetrically built, with the priapium on one side and the anus on the other side of the body. In most species, the number of males with a left or right-sided priapium is the same, but in some one type predominates. In females, the anus is on the midline of the underside.

Throat phallus fish are ovoviviparous . The eggs have fibrous outgrowths.

Internal system

There are 21 species described in 4 genera:

literature

Web links