Don't add any Catshark species the Picasso Trigger will bite eyes of the Shark. Personally had this happen to a Catshark I had in the aquarium with a small Picasso Trigger. Warned a lfs to remove a Queen Trigger out of a aquarium with Catsharks they ignored me so went back a couple of weeks later and sharks were missing eyes. I was very upset at the employee for not listening to me. Maybe a small Grouper species will be ok.