Bastard halibut, Korean halibut
The olive flounder (Paralichthys olivaceus), bastard halibut or Korean halibut, is a temperate marine species of large-tooth flounder native to the North-western Pacific Ocean.
It is often referred to as the Korean flatfish (광어) or Japanese flatfish when mentioned in the context of those countries. It is the highest valued finfish in the world, known to be excellent for aquaculture due to a rapid growth rate and popularity in Korea.
It reaches a length of 103 cm (41 in) and a weight of 9.1 kg (20 lb). In 2017 its genome and transcriptome was sequenced as a model to study flatfish asymmetry.
The olive flounder is often found in soft and muddy offshore, coastal areas where the water level goes down to 100 m in depth. The temperature of water in these areas range from 21- 24 °C or 69 -75 °F. Some flounder have been found in the Mariana Trench.
Olive flounder typically eat fish spawn, crustaceans, polychaetes, and small fish.
Olive flounder spawn anytime from January through August in shallow water, roughly about 70 cm in depth. The egg and larvae remain that way for about 24–50 days after hatching. Once they begin their metamorphosis process, they move towards more sandy areas and feed on shrimp. After achieving metamorphosis, the flounder move offshore and begin feeding on bigger fish in order to grow to their adult size.
