OKie dokie i have a beloved zoo colony that has what looks to be like a yellow slug looking thing in it if i could get a good pic i would but i cant. Any info on what to do and if its bad or good or what not i think it might be eating them.
I would be really concerned about anything in my zoo's there are zoanthid eating nudibraches that are commonly found, Either get a good picture of it for an ID or I would just take it out if it were me.