Bluestriped Angelfish (Chaetodontoplus septentrionalis) キンチャクダイ
I took this picture on a cold November day at Kashiragashima. I had a mask, swim shorts, camera, and a bag I put rocks in for weight. I wasn’t sure that I would be able to get in the water, so I was traveling light. These fish are said to eat sponges and tunicates. There was a lot of life here for them to munch on. Kashiragashima
Possibly the same Bluestriped Angelfish. Kashiragashima