i have been thinking about trying a trigger in my upcoming 90 gallon tank. i agree that each trigger's attitude reflects how it will do in your tank. but why the variation? it's probably related to the previous keeping and environment of the trigger you bought. was yours a juvenile? what food was it eating prior? was it captured from the ocean? i just bought a bicolor angelfish today at work from Petco. this fish is widely known to be hard to care for and a picky eater, and i read on here about many people claiming their's starve because they won't eat even the best prepared foods. this angelfish very well could have been raised on flake food, the breeders knowing that it would be sold to Petco (and fed flake) before it would probably eventually be sold to an uninformed buyer who would do the same at home.
sidenote - i just read a closed forum about how bad Petco's are and i'd like to say this in regards to what i said about Petco feeding all fish flake food: you might have heard how baaad of a store it is (and many Petco's could definitely do a lot better) but same goes for other local fish stores (even the owner operated small businesses, which i commonly visit and see beat up livestock) and also same goes for all of us who at once had a tank that wasn't cared for the way it should have been because we were so uninformed, and we who didn't know about that pretty little fish we decided to buy before reading so deep into
anyway i'd LOVE to have a trigger in my tank so i'll be reading whatever i can find until i decide to try or not. but yeah i am thinking a very young trigger (just over an inch) tought to feed on other dead foods and kept fat for a while to keep from grazing, might do the trick? maybe, but it's also instinct for them to kill so... also a large personal space for the trigger would have to give you a lot higher chance of success. also a trigger introduced last should feel less at home and less likely to go on a territorial killing feast. if one day your strawberry pseudochromis is hanging out where the trigger likes to nap between rocks he might just disappear after having lived fine in the tank around the trigger for a while.
at work we have two niger triggers and two undulated triggers living amongst each other. it may just happen to be this way for these four triggers, but the niger's are way more laid back than the undulated, who have larger mouths and seem more agressive and quick. but again, could just be these four.
i really want a trigger! their shape! their color! their movement like a helicopter vs most fish's movement being similar to an airplane!...ha. their personality and nesting habits! these fish are so interesting! ahhg...