Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Mochokidae
(Squeakers or upside-down catfishes)
Etymology: Atopochilus: Greek atopos = absurde, strange + Greek, cheilos = lip (Ref. 45335). More on author: Sauvage.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical; 3°N - 0°N
Africa: Ivindo, Ogooué, Nyanga and Louzibi Rivers in Gabon, the Rio Muni in Equatorial Guinea, and the Ntem River in southern Cameroon and Gabon (Ref. 81251).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 10.5 cm SL male/unsexed; (Ref. 81251)
Morphology | Morphometrics
soft rays: 10 - 11;
Vertebrae: 32 - 33. Diagnosis: body depth slightly less than its greatest width; head depressed with a somewhat rugose upper surface; snout broadly rounded; nostril nearer end of snout than to eye; buccal cleft straight; mandibular tooth band less than half as long antero-posteriorly as premaxillary tooth band; maxillary barbel reaching to half of head length and at least twice as long as mandibular barbels; humeral process striated and acutely pointed; adipose fin almost 3 times as long as deep; anal fin with 10-11 rays, 1st and occasionally 2nd rays rudimentary; pectoral spine, strong, striated and strongly serrated along posterior margin; pelvic fin reaching almost to anal fin origin; caudal peduncle 1.5 times as long as deep (Ref. 81251).
Coloration: body mottled brown with small dark spots on sides and dorsal surface of body; 2 dark bands present on posterior half of body (1 between adipose and anal fin and 1 on caudal peduncle); pectoral fin darkly pigmented along base of fin rays; distal half of pelvic and anal fin rays lightly pigmented; caudal fin with 2 dark bands, 1 at base and another at tips of fin rays (Ref. 81251).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Oviparous (Ref. 205). Distinct pairing during breeding (Ref. 205).
Gosse, J.-P., 1986. Mochokidae. p. 105-152. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels, MRAC, Tervuren; and ORSTOM, Paris. Vol. 2. (Ref. 3202)
IUCN Red List Status (Ref. 115185)
CITES (Ref. 115941)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00617 (0.00259 - 0.01467), b=3.09 (2.88 - 3.30), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.0 ±0.4 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 vulnerability (15 of 100) .