I have read that they are aggressive, and I have also read that they are not. Does anybody have one or have heard anything about this fish?

I've had a niger trigger for the past year w/ clown fish, purple and fire fish goby, sailfin , yellow and blue tang. He is the weakling of the tank. If I get close to the tank , he would hide on his rock. I only see him during feeding time.I have him in a 150 hex reef tank. It looks really cool, how he swims. He doesn't bother my corals. I also have 2 hermit crabs and a shrimp that he doesn't bother .My niger is 3 to 4 inches.It might be a hit or miss thang like flame angel ( reef safe or not so reef safe).

thanks tmercier83 you were a great help. haha