Theyre in a qt 55 with a huge ship(which has a ton of caves inside) I sometimes see the wrasse swimming around(which he shouldnt bc my last triggerfish ate its tail) I thought they were compatible? I need advice... also can a 3.5" picasso live with a 4" niger trigger in this qt 55? Im asking this because maybe I can put the wrasse in my 125 display where my picasso is, I havent gotten the niger tr yet thoufh