Actinopteri (ray-finned fishes) > Gobiiformes
(Gobies) > Butidae
(Marine gudgeons) > Butinae
Etymology: Bostrychus: Greek, bostrykos = cure of lack of hair (Ref. 45335).
More on author: Steindachner.
Environment: milieu / climate zone / depth range / distribution range
Marine; freshwater; brackish; demersal; amphidromous (Ref. 46888). Tropical
Eastern Atlantic: Senegal to Angola (Ref. 57413, 81660), 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 (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).
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. 125652)
Threat to humans
Fisheries: of no interest
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 123201
): 23.4 - 27.9, mean 26.5 °C (based on 64 cells).
Phylogenetic diversity index (Ref. 82804
= 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00342 - 0.01336), b=3.08 (2.91 - 3.25), in cm total length, 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
Fishing Vulnerability (Ref. 59153
): Low vulnerability (11 of 100).
Nutrients (Ref. 124155
): Calcium = 310 [145, 602] mg/100g ; Iron = 1.11 [0.63, 2.02] mg/100g ; Protein = 16.8 [15.2, 18.5] % ; Omega3 = 0.381 [0.185, 0.773] g/100g ; Selenium = 60.8 [28.2, 129.8] μg/100g ; VitaminA = 28.6 [10.2, 82.3] μg/100g ; Zinc = 1.86 [1.19, 2.97] mg/100g (wet weight);