Chinamanfish (Symphorus nematophorus) イトヒキフエダイ also Thread-finned Sea Perch
This Chinamanfish is good sized but only a juvenile. It is the first one that I had seen. Amami
Same Chinamanfish swimming away. The threads on the fins will disappear and the fish will become redder as an adult. They can get to be up to 80cm. Amami