Nagasaki Damsel (Pomacentrus nagasakiensis) ナガサキスズメダイ
The Nagasaki Damsel is often blue with blue and purple lines on face. an eye spot on back of dorsal fin, and a white tail. Amami
The Nagasaki Damsel can also be very dark blue or grey making the eye spot on the back of the dorsal fin hard to see. Amami