The five-eyed flounder, Pseudorhombus quinquocellatus, is a species of flatfish

Flatfish

The flatfish are an order of ray-finned fish, also called the Heterosomata, sometimes classified as a suborder of Perciformes. In many species, both eyes lie on one side of the head, one or the other migrating through and around the head during development...

 in the large-tooth flounder family, Paralichthyidae

Paralichthyidae

Large-tooth flounders are a family, Paralichthyidae, of flounders. They lie on the sea bed on their right side; both eyes are on the left side of the head, while the Pleuronectidae are the opposite with their eyes on the right side....

. It is a demersal fish that lives in tropical waters, inhabiting deep waters on the continental shelf of the western Pacific Ocean

Pacific Ocean

The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

, from Taiwan

Taiwan

Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...

 in the north to Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

in the south.

Like the rest of the large-tooth flounders, it has both eyes on the left side of its head. It grows to around 20 centimetres (7.9 in) in length. It is brownish in colour, with five dark rings on its ocular side, as suggested by its common name.