Taxonomy
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Actinopterygii
- Order
- Perciformes
- Family
- Paralichthyidae
- Genus
- Paralichthys
- Species
- olivaceus
Habitat
Olive flounders primarily inhabit coastal waters and continental shelves in the Western Pacific, favoring sandy or muddy bottoms at depths from shallow estuaries to about 200 meters. They are commonly found in temperate regions like Japan, Korea, and China, where they tolerate a range of salinities including brackish waters.
Diet
Olive flounders are carnivorous predators that feed mainly on small fish, crustaceans such as shrimp and crabs, and polychaete worms. They employ an ambush strategy, lying partially buried in sediment and striking quickly at prey, with feeding most active during twilight hours or at night.
Behavior
Olive flounders are solitary and territorial, often burying themselves in sand or mud to hide from predators and ambush prey. They are primarily nocturnal or crepuscular, exhibiting excellent camouflage through color changes to match their surroundings. During colder months, they may migrate to deeper waters for warmer temperatures.
Fishing
Target olive flounders in the coastal waters of the Western Pacific, including areas like Japan, Korea, the Korean Peninsula, Hong Kong, and the South China Sea, focusing on sandy or muddy bottoms in shallow estuaries or depths up to 200 meters where they bury themselves to ambush prey. Use effective bottom fishing techniques such as drifting with bait or jigging, employing medium-heavy rods with 20-30 lb test line, sturdy reels, and circle hooks to minimize injury during catch-and-release; bait options include live shrimp, crabs, small fish, or lures that mimic these to entice their nocturnal feeding strikes. The best seasons are spring and early summer during spawning, with optimal times at twilight or night when they are most active, though they can be caught year-round in temperate regions. These fish grow to impressive sizes, reaching up to 103 cm in length and 31 pounds 15 ounces, with IGFA records underscoring their appeal as a top sport fish. As a key species in recreational fishing, olive flounders benefit from angler-funded conservation programs that enforce effective management tools like regulated seasons and catch limits to sustain populations, supporting habitat restoration and ensuring these waters remain healthy for future generations through license fees and excise taxes.
Conservation Status
Listed as Not Evaluated by IUCN.