hey Colin, welcome to TR. i agree with everything above. for more ifo on the trigger click the link he provided or go to
www.fishbase.org as they are FULL of useful info. i personally, would not attempt a trigger in a 55g tank, but that is just my opinion.
DAMNsels are the cheapest saltwater fish to my knowledge, the next would be something like Percula clownfish (technically they are DAMNsels too). does the way that i spell DAMNsel tell you anything about them ??
lol the Percula Clowns are a pretty hardy fish and should be well suited for a tank the size of yours. not to mention that they will add a lot of color to the tank.
