Hi. Well I have a 120 g where my main two fish are a pair of Blue Throat Triggerfish. The male is big for a bluejaw. And he is very territorial. I purchased a Niger Triggerfish yesterday and the Bluejaw was going to fight it to the death. The Bluejaw is bigger. And meaner. Luckily I have a 90 gallon with another pair of Bluethroat triggers and that male is only territorial for one part of the the aquarium. So the Niger has a home.