Percophidae

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Percophidae
Bembrops gobioides.jpg
Goby flathead, Bembrops gobioides
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Trachiniformes
Family: Percophidae
Swainson, 1839 [1]
Subfamilies

The Percophidae, duckbills, are a family of percomorph fishes, from the order Trachiniformes, found in tropical and subtropical waters of the Atlantic and Indian Oceans and in the southwestern and southeastern Pacific.

Contents

They are small fishes: the largest species, the Brazilian flathead, Percophis brasiliensis, grows up to about 50 centimetres (20 in), but 10 centimetres (3.9 in) to 20 centimetres (7.9 in) is more typical. A few species are fished commercially, including the Brazilian flathead.

Characteristics

The species in the family Percophidae are elongated, benthic fishes with an anteriorly depressed head, a broad flat snout which gives rise to the common name duckbills. The mouth is large with a prognathous lower jaw and exposed maxilla. They have large closely placed eyes. There are two spines on the opercula and one on subopercula. They have tiny conical teeth on the mandibles and on the vomer and palatine bones. There are two dorsal fins an anterior dorsal fin with 6 slender spines and a posterior dorsal fin with 13 to 18 soft rays, the pelvic fins have 1 weak spine and 5 branched rays and these are positioned anteriorly to the pectoral fins with their bases widely separated. The anal fin has only 15 to 25 soft rays and the pectoral fins have between 20 and 28 rays. They body is covered in ctenoid scales and the lateral line curves underneath the anterior dorsal fin to below the middle of the flank with the 2 or 3 scales nearest the head being keeled. They are generally brownish in colour with indistinct dark blotches along the body. They are benthic, carnivorous fish which are found at depths of 100–600 metres (330–1,970 ft). They are relatively small and uncommon and are of no interest to fisheries. [2]

Subfamilies and genera

The family Percophidae is divided into three subfamilies [1]

Bembrops platyrhynchus Natal duckbill BembropsPlatyrhynchusAlcock.jpg
Bembrops platyrhynchus Natal duckbill

Timeline of genera

QuaternaryNeogenePaleogeneHolocenePleist.Plio.MioceneOligoceneEocenePaleoceneHemerocoetesBembropsQuaternaryNeogenePaleogeneHolocenePleist.Plio.MioceneOligoceneEocenePaleocenePercophidae

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References

  1. 1 2 Bailly N, ed. (2017). "Percophidae Swainson, 1839". FishBase . World Register of Marine Species . Retrieved 17 June 2018.
  2. "Percophidae" (PDF). Fish Identification Sheets Fishing Area 51 W. Indian Ocean. Food and Agriculture Organization of the United Nations. 1983. Retrieved 17 June 2018.