This aquarium is 48x12x16 tall. It has plenty of swimming space and a nice current courtesy of a modified Tunze nanostream putting out 1100+ gph. I've been considering either a yellow tang, or possibly a regal tang (pacific blue, hippo), but I know that in the end this situation probably wouldn't be fair to the fish. I've heard a few suggestions about dwarf angels, but I've also heard that most will nip at corals. I currently have a maroon clown, 6 line wrasse, and purple firefish goby. Any ideas? I'm looking for something very colourful, and very noticeable in the tank, not something that will hide most of the day... I may resort to getting a small school of green chromis, but this isn't my first choice...