Fingerfish
| Fingerfish | ||||||||||||
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Fingerfish ( Polydactylus quadrifilis ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Polydactylus quadrifilis | ||||||||||||
| ( Cuvier , 1829) |
The fingerfish ( Polydactylus quadrifilis , Syn . : Polynemus quadrifilis ) is a marine fish from the threadfin family .
description
features
The fingerfish grows to a maximum of 2 meters long, making it the largest species of threadfin fish alongside Eleutheronema tetradactylum . About 32 percent of the standard length is on the head, and about 37 percent on the caudal fin. The pectoral fins are yellowish in color. There are 4 threads on each (most other threadlossers have 5 to 9 threads). The first dorsal fin consists of 8 hard rays. The third hard jet is the longest, the first is greatly shortened. The first and second dorsal fin are clearly separated from each other. The anal fin and the second dorsal fin are large and concave. The former has 3 hard rays and 11 soft rays, the latter one hard ray and 13 soft rays. The homocerk tail fin is large and forked deeply. The flanks are dark silver, the back is darker colored. The belly is white. The mouth is strongly subordinate. The large eyes are far in front of the head.
Way of life
The fingerfish is a bottom-dwelling predatory fish. It prefers to feed on crustaceans and fish. With the long fin threads it can track down food at the bottom. He is a good and fast swimmer.
Home and living space
The fingerfish inhabit the West African coastal areas from Senegal in the north to the Congo in the south. He can also be found in front of São Tomé and Príncipe . Occasionally he spends time in brackish water . It prefers soft, sandy subsoil.
meaning
The fingerfish is important as a food fish in the commercial fishery , and it is also popular among sport fishermen . It is not considered endangered.
swell
Individual evidence
- ↑ a b c d e Polydactylus quadrifilis on Fishbase.org (English)
- ↑ Eleutheronema tetradactylum on Fishbase.org (English)
- ↑ a b c d Roland J. McKay: An annotated and illustrated catalog of polynemid species known to date. FAO Species Catalog for Fishery Purposes. No. 3rd FAO Rome 2004. ( PDF )
Web links
- Polydactylus quadrifilis on Fishbase.org (English)
- Giant African Threadfin on the International Game Fish Association website
- Image of a finger fish on a Cameroonian postage stamp on WoRMS