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Mastacembelus cryptacanthus  Günther, 1867

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

Actinopterygii (ray-finned fishes) > Synbranchiformes (Spiny eels) > Mastacembelidae (Spiny eels)
Etymology: Mastacembelus: Greek, mastax, -agos = bite + Greek, emballo = to throw oneself (Ref. 45335).   More on author: Günther.

Environment / Climate / Range Ecology

Freshwater; demersal.   Tropical; 24°C - 30°C (Ref. 12468)

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

Africa: Ouémé basin (Benin) (Ref. 57415, 81678) up to the Ntem (Cameroon) (Ref. 81678), including the Lake Chad basin (Ref. 57415). Also known from Bioko Island (formerly Fernando Poo) in Equatorial Guinea (Ref. 81678). Reported from the middle Congo River basin (Ref. 6060, 46252), but this is questionable and unconfirmed in Ref. 57415 or 81678.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 34.5 cm SL male/unsexed; (Ref. 57415)

Short description Morphology | Morphometrics

Dorsal spines (total): 24 - 33; Dorsal soft rays (total): 93-143; Anal soft rays: 90 - 140; Vertebrae: 95 - 118. Diagnosis: 1st dorsal spine situated clearly posterior to posterior edge of pectoral fin; as a result distance from posterior edge of pectoral fin to anterior origin of first dorsal spine 8.9-81.5% HL (m=37.4) (Ref. 57415); normally 1, rather small, pre-orbital spine with a tendency to no pre-orbital spine in larger specimens; 1 (exceptionally) up to 4 (exceptionally), rather small, pre-opercular spines (median 2); post-anal length 44.1-58.3% SL (m=52.0), increasing with size, comparable to or longer than preanal length, 40.0-51.8% SL (m=46.6), decreasing with size; distance from anterior border of snout to last externally visible dorsal spine, between 44.3-57.9% SL (m=51,3), comparable to distance from anterior border of snout to last externally visible anal spine, 44.3-57.3% SL (m=51.2), both increasing with size; 6-10 caudal fin rays; 7-13 predorsal vertebrae; 33-41 abdominal vertebrae; 0-(+2) in-between vertebrae; 61-78 caudal vertebrae (Ref. 57415). Coloration: some general intraspecific colour pattern variation and also some geographically related colour pattern variation can be noted; uniformly light brown overall background colour; dorsal-midline with or without a series of large, dark brown, squared spots or a more or less continuous dark brown band; lateral dark brown band originating at base of rostral appendage, passing through eye, above pectoral fin and continuing along lateral side of body and tail; lateral dark brown band with a well delimited and well contrasted battlement-like upper edge; lower edge less well delimited and gradually becoming lighter ventrally; lower sides with or eventually without several, round, yellowish-white spots; lips, ventral side of head, belly and abdomen uniformly yellowish-white with a few dark brown markings on ventral surface of head; dorsal, caudal and anal fins white of overall background colour; dorsal and anal fin base with a series of dark brown spots eventually partially situated on tail itself; dorsal, caudal and posterior half of anal fin with numerous, additional, small, irregularly displaced, dark brown spots; pectoral fins white of overall background colour and often with no spots or markings; some size-related colour pattern changes, notably a general darkening of median fins with increasing size of specimens; unpaired fins of small specimens with a white overall appearance whereas unpaired fins of large specimens have a dark brown overall appearance however with a white outermost margin; colour pattern of small specimens also characterized by presence of a more or less well defined dark brown band with a highly variable number of, small, yellowish-white spots on lateral sides of body and tail (Ref. 57415).

Biology     Glossary (e.g. epibenthic)

Maximum reported TL was 354mm (Ref. 57415).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Vreven, E.J., 2003. Mastacembelidae. p. 708-737 In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douce et saumâtres de l'Afrique de l'Ouest, Tome 2. Coll. Faune et Flore tropicales 40. Musée Royal de l'Afrique Centrale, Tervuren, Belgique, Museum National d'Histoire Naturalle, Paris, France and Institut de Recherche pour le Développement, Paris, France. 815 p. (Ref. 57415)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 108899)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries:
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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=0.00295 (0.00132 - 0.00659), b=2.93 (2.74 - 3.12), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.3   ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Moderate vulnerability (38 of 100) .
Price category (Ref. 80766):   Unknown.