Good capture. These things can be a paint to photograph. Their luminescence likes to screw with my camera so I've never gotten this clear a shot of them, and they like to dart randomly when you're framing. This is a great photo though. I love how they composed themselves for you, though, I'm sure you probably waited and took a substantial amount of shots.
Actually, I didn't paint it. This photo was taken in TURKUAZOO(aquarium) and there was a kind of spot lights. Why they are colourful. About the photo quality, Yes my camera has really good performance to high ISO.
"can be a pain to photograph" haha. Damn typos. Tried to shoot some at the Waikiki aquarium in Hawaii, pushed the ISO as best I could but things still came out wonky. The black light they use in the tanks to make the jelly fish illuminate didn't help matters.