Remo flounder (Oncopterus darwinii), first described by Steindachner, 1874 is a medium-sized fish. Adults typically reach 30.40 cm in maximum length. It inhabits marine coastal and open-ocean environments. Recorded depth range: 20 to 80 metres. It occurs in Subtropical waters. It feeds on a mix of small fish and invertebrates as a mid-level predator. On the IUCN Red List, it is classified as Least Concern.
Dorsal spines (total): 0; Dorsal soft rays (total): 59 - 67; Anal spines: 0; Anal soft rays: 41 - 46. Pectoral fin with 12 soft rays on ocular side, 11 on blind side. Strong spine anterior to anal fin, prominent in young specimens. Lateral line with a distinct curve above pectoral fin and with several transverse accessory branches. Pale brownish, covered with many small white spots; some larger white spots at upper and lower edges of body .: short and / or deep.
Behavioural data for Remo flounder is currently being reviewed.
Marine; demersal; depth range 20 - 80 m . Subtropical; 33°S - 44°S, 67°W - 51°W Southwest Atlantic: Santa Catarina, Brazil to Golfo de Sán Matías, Argentina.
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