Can I add a 3" coral beauty angelfish to my 125 with a 3.5" niger triggerfish?

[Makubex]

Fowlr of course, there is also a 6.5" foxface and a couple 4" tangs which are a blue hippo and sailfin tang

 

[JC1977]

Should be fine from my experience just be sure to use precautions when introducing him such as an acclimation box or mirrors to distract the fish you know to be more territorial. Aside from that you don’t have any other angels or fish that stick out as obvious candidates to give the coral Beaty trouble.