That's so funny, I just talked my aunt into rescuing a fishy last night and he's this beautiful green/gold/rust color iridescence with no light and in the light it turns to pink/purple/bright red opposite Oceania.
As for a name, could always go with Harlequin (Harley for short?) for the girl that reminds you of a clown...sounds a bit more fancy shmancy! Plus her scales remind me of the diamond shapes of their costumes.
As for the goooooorgeous copper colored girls, I keep having Cleopatra (Cleo for short?) and Nefertiti (Nefi for short?) pop into my head. Probably cause the black/coppery colors make me think of the Egyptian pyramids and jewelry!
Seriously, all of your fish are so beautiful!