Where I live, we mostly get cold-water-loving fish, but here are more of the warm-water-loving fish, or reef fish.
Butterfly fish would have to be my favourite of the reef fish. This bright yellow one is (I think) Bennett's butterflyfish. My hesitation is that my book says they're rare and they are difficult to get a good photo because they employ devious tactics to hide. I just snapped this, so maybe I have the wrong species, but it's definitely a beautiful butterfly fish.
Parrotfish or Wrasse are beautifully coloured too. After Googling, I think this is the Green-cheeked parrotfish. Whatever it is, the blue hues were amazing.
And this yellow and orange fish also defies my skills at finding out who it is...but gorgeous none-the-less.