WTV: Blue-throat / Pink-Tail / Niger Trigger

[Werbo]

I didn't know that triggers were possible in a reef. I imagine the bio load must be quite high.
Of the Blue Throat, Pink tail, Niger, Crosshatch & Sargassum Triggers that can be classified as reef safe (but with caution) just as some angels. Of the 4 mentioned triggers in one considered more reef safe than the others.