According to the data: body length:120-300mm; Weight:125-1800g; Therefore, the length of 3 kg of Sparus macrocephalus should be 25-30 cm.

Sparus macrocephalus is an animal belonging to Sparidae, which is distributed in the western Pacific, including China, Japan, South Korea, North Korea, Russia, Vietnam and other coastal areas. It likes to live in sandy silt or rocky sea areas, is omnivorous and extremely greedy, and its staple food is mollusks, shellfish, polychaetes and small fish.