Оку is a type of freshwater fish belonging to the family Percidae. It is commonly found in rivers and lakes across Europe and Asia. Known for its distinctive appearance, the оку has a streamlined body and sharp spines along its dorsal fin. This fish is popular among anglers due to its fighting ability and is often sought after for sport fishing. The оку primarily feeds on smaller fish, insects, and crustaceans. It typically inhabits areas with plenty of vegetation, which provides cover and hunting grounds. This species plays an important role in the aquatic ecosystem, helping to maintain the balance of fish populations in its habitat.