The Remo flounder, ''Oncopterus darwinii'', is an edible

flatfish A flatfish is a member of the Ray-finned fish, ray-finned demersal fish Order (biology), suborder Pleuronectoidei, also called the Heterosomata. In many species, both eyes lie on one side of the head, one or the other migrating through or around ...

of the family

Pleuronectidae Pleuronectidae, also known as righteye flounders, are a family of flounders. They are called "righteye flounders" because most species lie on the sea bottom on their left sides, with both eyes on their right sides. The Paralichthyidae are the o ...

. It is a

demersal The demersal zone is the part of the sea or ocean (or deep lake) consisting of the part of the water column near to (and significantly affected by) the seabed and the benthos. The demersal zone is just above the benthic zone and forms a layer o ...

fish that lives on bottoms at depths of between . Its native habitat is the southwestern Atlantic along the southeast coast of South America, from Santa Catarina,

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

in the north to the San Matías Gulf,

Argentina Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

in the south. It can reach in length.

Identification

The Remo flounder is a righteyed flounder and so has both its eyes on the right-hand side of its body. Its upper surface is pale brown in colour with small white spots, and large white spots at its edges. The

lateral line The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelia ...

is marked by a distinctive semi-circular curve above the pectoral fin.

References

Pleuronectidae Fish of the Atlantic Ocean Southeastern South American coastal fauna Fish described in 1874 {{Pleuronectiformes-stub