I have them with other fish and there's no issues. A lot of times they are misidentified and you get a different fish that can be a total dick. They get along with each other and with other fish. I have docile fish and some larger fish. As far as aiptasia they did clean my rock that had aiptasia. So far my experience with them is great and I'd recommend it to others if they have an aiptasia problem. I wouldn't mix molly miller with other blennies or smaller fish that looks like a goby.