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Clarias angolensis  Steindachner, 1866

Angolian walking catfish
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Native range | All suitable habitat
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Clarias angolensis   AquaMaps   Data sources: GBIF OBIS
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Image of Clarias angolensis (Angolian walking catfish)
Clarias angolensis
Picture by Shandikov, G.A.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Siluriformes (Catfish) > Clariidae (Airbreathing catfishes)
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 Ecology

Freshwater; demersal; pH range: 7.0 - 9.0; dH range: 15 - 40.   Tropical; 23°C - 28°C (Ref. 2060); 3°N - 5°S

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

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)

Short description Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 67-84; Anal 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).

Biology     Glossary (e.g. epibenthic)

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

Main reference Upload your references | References | Coordinator | Collaborators

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. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Aquarium: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 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), in cm Total Length, 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) .