Astronotus ocellatus (Agassiz, 1831)
Oscar
photo by Schüür, G.

Family:  Cichlidae (Cichlids), subfamily: Astronotinae
Max. size:  45.7 cm TL (male/unsexed); max.weight: 1,580.0 g
Environment:  benthopelagic; freshwater; pH range: 6 - 8; dH range: 5 - 19
Distribution:  South America: Amazon River basin in Peru, Colombia and Brazil; French Guiana. Reported from Argentina (Ref. 9086).
Diagnosis:  Dorsal spines (total): 12-14; Dorsal soft rays (total): 19-21; Anal spines: 3-3; Anal soft rays: 15-17. Large mouth with thick lips; 7 preopercular pores; first gill arch without lobe; gill rakers short and thick with many denticles; dorsal and anal fins bases densely scaled; many branched rays; body color dark with bright orange opercle margin and ventral parts of the lateral sides of the body; often a black rounded blotch with orange margin at caudal fin base (Ref. 35237).
Biology:  Preferably inhabits quiet shallow waters in mud-bottomed and sand-bottomed canals and ponds (Ref. 5723). Feeds on small fish, crayfish, worms and insect larvae. Quite popular with aquarists but not for aquaculturists because of its slow growth (Ref. 35237). Maximum length 40 cm TL (Ref. 5723). A highly esteemed food fish in South America (Ref. 44091).
IUCN Red List Status: Not Evaluated (N.E.) Ref. (123251)
Threat to humans:  harmless
Country info:   
 

Entered by: Froese, Rainer - 01.05.91
Modified by: Luna, Susan M. - 28.05.08
Checked by: Kullander, Sven O. - 15.02.01

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