I have triggers with my shark and rays. It depends on the fish. I keep my fish fed well but some fish are just a problem. I had a morish idol that hated the rays and attacked their tails. I also had a problem with a porc puffer but did not have any issues with a spiny puffer. Now I have a 8 inch cross hatch, 5 inch pink tail, and a 4 inch clown trigger and they all ignore them.