Судак, or Sander lucioperca, is a popular freshwater fish found in rivers and lakes across Europe and Asia. It is known for its elongated body, sharp teeth, and distinctive dark stripes along its sides. Sудак is a predatory fish, primarily feeding on smaller fish and invertebrates, making it an important species in aquatic ecosystems. This fish is highly valued for its firm, white flesh and is often sought after by anglers and chefs alike. Sудак can grow quite large, reaching lengths of up to 1 meter (3.3 feet) and weights of over 10 kilograms (22 pounds). Its popularity has led to various fishing regulations to ensure sustainable populations.