Actinopterygii (ray-finned fishes) > Perciformes
(Perch-likes) > Eleotridae
(Sleepers) > Butinae
Etymology: Bostrychus: Greek, bostrykos = cure of lack of hair (Ref. 45335).
Environment / Climate / Range
Marine; freshwater; brackish; demersal; amphidromous (Ref. 46888). Tropical, preferred ?
Eastern Atlantic: Senegal to Angola (Ref. 57413), including the islands of Guinea (Ref. 10812).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 21.0 cm TL male/unsexed; (Ref. 57413)
Morphology | Morphometrics
soft rays: 8. Diagnosis: 42-58 predorsal scales, extending to interorbital space; 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; caudal fin rounded with 17 segmented rays, 15 of which are branched (Ref. 57413).
Coloration: Preserved specimens: dark brown or black, lighter ventrally; several dark, vertical bars present along midline of flanks, last at base of caudal fin; 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).
Found in estuaries and other brackish-water environments; occasionally entering freshwater (Ref. 57413). Food items include small crabs (Ref. 10812).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Miller, P.J. and P. Wongrat, 1990. Eleotridae. p. 952-957. In J. C. Quéro, J. C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 2. (Ref. 10812)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Fisheries: of no interest
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00603 (0.00287 - 0.01263), b=3.03 (2.84 - 3.22), based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic Level (Ref. 69278
): 4.0 ±0.7 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (28 of 100) .