They are actually really beautiful fish, especially close up. We saw tons of them on a dive trip to Bonaire. We were given little mini-orange flags attached to ropes and weights and were asked drop a flag wherever we saw one so the marine/gov't folks could catch and remove them. It's a shame they are such a menace to other fish.
The good news is that I hear the meat is really sweet and if filleted properly they are great eating.