Polydactylus quadrifilis (Cuvier, 1829)
Giant African threadfin
Polydactylus quadrifilis
photo by Klimpel, S.

 Family:  Polynemidae (Threadfins)
 Max. size:  200 cm TL (male/unsexed); max.weight: 75 kg
 Environment:  demersal; depth range 15 - 55 m,
 Distribution:  Eastern Atlantic: Senegal to Angola (Ref. 57402). Also reported from Mauritania (Ref. 55783).
 Diagnosis:  Dorsal spines (total): 9-9; Dorsal soft rays (total): 12-13; Anal spines: 3-3; Anal soft rays: 11-12. Diagnosis: detached pectoral filaments short, only slightly longer than upper pectoral fin; base of anal fin as long as base of 2nd dorsal fin; body moderately elongate and compressed, its height comprised 4.0 to 4.5 times in standard length; snout very short, blunt and prominent; mouth inferior; maxillary bone distinctly widened at its end, reaching largely past eye; 2 widely separated dorsal fins, 1st with 8 flexible spines, 2nd with one flexible spine and 12-13 soft rays; 2nd dorsal fin and anal fin bases nearly equal; pectoral fin inserted very low on body, threadlike filaments 4 in number, generally somewhat longer than upper part of fin; scales ctenoid; head scaly (Ref. 57402). Coloration: body uniformly silvery, greyish on back, shading to whitish ventrally; fins yellow or grey; a dark blotch often present on gill cover (Ref. 57402).
 Biology:  Occurs in shallow waters, over sandy and muddy bottoms, sometimes in brackish habitats (Ref. 57343). Enters estuaries; occasionally caught in fresh water (Ref. 57402). Feeds on crustaceans and fishes (Ref. 10799). Flesh fairly tasteful (Ref. 57402).
 IUCN Red List Status:   (Ref. 96402)
 Threat to humans:  harmless
 Country info:   
 

 Entered by: Luna, Susan M. - 11.02.92
 Modified by: Musschoot, Tobias - 28.04.15
 Checked by: Sa-a, Pascualita - 03.07.94

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