| Butidae (Gudgeon gobies) |
| 21 cm TL (male/unsexed) |
|
demersal; freshwater; brackish; marine, amphidromous |
| Eastern Atlantic: Senegal to Angola (Ref. 57413, 81660), including the islands of Guinea (Ref. 10812). |
|
Dorsal spines (total): 7-7; Dorsal soft rays (total): 9; Anal spines: 1-1; Anal soft rays: 8. Diagnosis: 42-58 predorsal scales (Ref. 57413, 81660), extending to interorbital space (Ref. 57413). Cheek and opercle scaled (Ref. 81660). Small scales on operculum and preoperculum; 76-86 (perhaps up to 94) scales in longitudinal series (including 4 or more scales on caudal fin); 31-40 scales in rearward transverse series; 1st dorsal fin: VI; 2nd dorsal fin: I,9; anal fin: I,8; pectoral fins: 16 (Ref. 57413, 81660). Caudal fin rounded with 17 segmented rays, 15 of which are branched (Ref. 57413).
Coloration: Preserved specimens: dark brown or black, lighter ventrally (Ref. 57413, 81660). Several dark, vertical bars present along midline of flanks, last at base of caudal fin (Ref. 57413). Fins dark; a distinct dark spot on dorsal margin of caudal fin near its base; ventral margins of anal and caudal fins white; pelvics with white lateral margins (Ref. 57413, 81660). |
| Found in estuaries and other brackish-water environments; occasionally entering freshwater (Ref. 57413, 81660). Food items include small crabs (Ref. 10812). |
|
Least Concern (LC); Date assessed: 20 July 2019 Ref. (130435)
|
| harmless |
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