These are the most skittish of the three common types of Angelfish, and the hardest to get on film. Red Finger Sponge Haliclona Rubens and green Boulder Coral Montastrea annularis in the background.
Capt. Mick Trzaska of the dive boat CRT II also calls this the "Bomb Wreck", since it once produced a live aircraft-type explosive. A diver had sent it up with a lift bag thinking it was a champagne bottle! How it got there is anyone's guess.