Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Clariidae
Etymology: Clarias: Greek, chlaros = lively, in reference to the ability of the fish to live for a long time out of water. More on author: Steindachner.
Environment / Climate / Range
Freshwater; demersal; pH range: 7.0 - 9.0; dH range: 15 - 40. Tropical; 23°C - 28°C (Ref. 2060), preferred ?; 3°N - 5°S
Africa: lower and middle Congo River basin including Ubangi and Kasai drainages (Ref. 248). Also reported from the Maiko-Loboya (lower Lualaba)(Ref. 106245). Also present in the lower Ogooué in Gabon, and the Kouilou and Chiloango in Republic of Congo (Ref. 81644).
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 35.0 cm TL male/unsexed; (Ref. 3820)
Morphology | Morphometrics
soft rays: 55 - 69. Diagnosis: head length 22.3-27.1% SL (Ref. 101841). Head pointed in dorsal outline; snout slightly rounded; eyes dorsally located (Ref. 248). Interorbital distance 41.4-48.6% HL (Ref. 101841). Tooth plates relatively small (Ref. 248), width of premaxillary tooth plate 24.3-30.7% HL, and of vomerine tooth plate 20.9-27.5% HL; maxillary barbel length 105.1-195.3% HL; outer mandibular barbel length 95.0-134.5% HL (Ref. 101841). Frontal fontanelle long and narrow (`knife-shaped'); occipital fontanelle oval- shaped and relatively large; supraorbital and the `dermosphenotic' joined by a common suture in specimens over 70 mm SL; dorsal and anal fin nearly reaching caudal fin, but not confluent; gill rakers long and slender, increasing with age; openings of secondary canals along lateral line visible as irregularly placed white spots on the body (Ref. 248). Pectoral spine strongly serrated on outside and inside; surface of cleithrum exposed through skin is intermediate; inner angle formed by both paired bones sharp; cleithrum length 13.0-18.6% HL; dorsal fin length 65.1-73.8% SL; distance from dorsal to caudal fin 0.9-2.7% SL (Ref. 101841).
Colouration: preserved specimens with uniform colouration; dorsum, flanks and dorsal parts of paired fins are dark brown, while ventrum and ventral parts of paired fins are pale brown to grey (Ref. 248, 101841). Some specimens may show irregular pattern of small white spots on body (Ref. 101841).
Inhabits rivers, lakes and swamps. Feeds on a variety of food like algae, plants, Hydracarina, larvae of Ephemeroptera, Chironomidae, Ceratopogonidae, remains of remains (Coleoptera) and fish remains (Cichlidae, Anabantidae) (Ref. 248).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Teugels, G.G., 1986. A systematic revision of the African species of the genus Clarias (Pisces; Clariidae). Ann. Mus. R. Afr. Centr., Sci. Zool., 247:199 p. (Ref. 248)
IUCN Red List Status (Ref. 109396)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00336 - 0.01560), b=2.99 (2.82 - 3.16), based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.3 ±0.46 se; Based on food items.
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) .