I’ve had my racoon butterfly in my reef for over 5 ½ years and it’s been a model citizen. Doesn’t touch any corals (SPS/LPS) or my BTA’s, but they host a tomato clown so that may be why. I originally got mine for Aiptasia control, but it didn’t touch them. The only invert it ever went after was a feather duster worm. Although, different fish have different personalities so I may have gotten lucky with it not harming my reef. As far as Aiptasia control, Berghia nudibranchs were very effective for me. It took a couple of months for them to grow and build up a breeding population, but after that they completely eradicated them from my tank.