Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Ariidae
(Sea catfishes) > Ariinae
Etymology: Cathorops: Greek, kathorao = to observe, to watch + Greek, ops = appearance (Ref. 45335); spixii: The name is dedicated to the ichthyologist of the 19th century, J.B. de Spix (Ref. 35381). More on author: Agassiz.
Environment: milieu / climate zone / depth range / distribution range
Marine; brackish; demersal; depth range 1 - 50 m (Ref. 5217). Tropical; 13°N - 23°S, 77°W - 34°W
Western Atlantic: Atlantic and Caribbean rivers and estuaries from Colombia to Brazil.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?, range 10 - 22.4 cm
Max length : 30.0 cm TL male/unsexed; (Ref. 3265); common length : 20.0 cm TL male/unsexed; (Ref. 3265); max. published weight: 97.50 g (Ref. 118626)
3 pairs of barbels on rostral region, 2 pairs on lower jaw, 1 pair on posterior end of maxilla; body dark brown or black dorsally, pale yellow ventrally; fin membranes brown, with small black spots (Ref. 13608). Head is widely flattened from above, nostril rounded, mouth inferior. The cephalic surface hardly reaches the level of the eyes (Ref. 35381).
Found in shallow coastal marine waters and brackish estuaries, lagoons and river mouths. Also in hypersaline waters (Ref. 5217). Feeds mainly on invertebrates and small fishes. Juveniles feed on amphipods, isopods and copepods (Ref. 35381). Flesh considered good quality (Ref. 5217). Sold locally.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Marceniuk, A.P. and C.J. Ferraris Jr., 2003. Ariidae (Sea catfishes). p. 447-455. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the freshwater fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 39852)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 115941)
Threat to humans
Traumatogenic (Ref. 58010)
Fisheries: minor commercial
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Preferred temperature (Ref. 115969
): 24.9 - 28.2, mean 27.4 (based on 118 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00794 (0.00655 - 0.00964), b=3.02 (2.97 - 3.07), in cm Total Length, based on LWR estimates for this species (Ref. 93245
Trophic Level (Ref. 69278
): 3.5 ±0.1 se; Based on diet studies.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): High vulnerability (60 of 100) .