Black fish
| Black fish | ||||||||||||
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Black fish ( Centrolophus niger ) |
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Centrolophus | ||||||||||||
| Lacépède , 1802 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Centrolophus niger | ||||||||||||
| ( Gmelin , 1789) |
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The black fish ( Centrolophus niger ) from the black fish family (Centrolophidae) is an inhabitant of the high seas, which can be up to 1.5 m long. It inhabits all temperate seas (except the North Pacific) including the Mediterranean; in the east Atlantic it occurs also in the tropical area, or north to Iceland. Its scientific name (from Greek κεντρολόφος ) means "spiky head" (because of the shape of the dorsal fin).
description
The North American terms "black ruff" or "Bermuda chub" (next blackfish and rudderfish ) descriptive meet not particularly good ( ruff = " ruff "; chub = " chub " - there is but because of the rounded head profile no-known freshwater fish this body shape). The black fish is at least dark brown or dark gray to (blue) black, with the fins being the darkest as far as possible. Two to four vertical stripes can be seen in juvenile fish. The mouth is small (length slightly larger than the diameter of the eye). The body is rather compressed on the sides. The fin formula is DV / 37–41, A III / 20–24, P 19–23. The hard-ray sections of the fins are skin-covered. The pelvic fins are weak. The sideline is curved in 190–230 cycloid scales . On the inside of the first gill arch are 18-23 spines. The function of the postpharyngeal sacs is unclear. Since he no longer has a swim bladder when sexually mature, the ossification must remain weak.
Way of life
This epi- and mesopelagic fish occurs up to a depth of 1100 m and predatory feeds on various Nekton animals, for example fish, crustaceans, squids, salps, rib jellyfish and snails. One often meets him in small groups; the juveniles live epipelagic , associated with medusas and salps. The sexually mature fish also like to cling to flotsam. It is edible and of interest to deep sea anglers. Similar to Ruvettus or Lepidocybium flavobrunneum , the musculature can - depending on nourishing animals - contain larger amounts of lipids that are indigestible for us (diacylglyceryl ester, squalene, etc.), which can lead to diarrhea , although the "rudderfish" causes the least discomfort (apparently because he only consumes local or seasonal food, which then creates keriorrhea problems in humans).
Web links
- Blackfish on Fishbase.org (English)
receipt
- ↑ Peter D. Nichols, Ben D. Mooney, Nicholas G. Elliott: Unusually high levels of non-saponifiable lipids in the fishes escolar and rudderfish: Identification by gas and thin-layer chromatography. In: Journal of Chromatography. A , Vol. 936, No. 1/2, 2001, pp. 183-191, doi : 10.1016 / S0021-9673 (01) 00894-9 .