Yea maroons will do that, but they take super good care of the nems once they take to it. Usually keepingin clowns within the same species work ok in a big enough tank. Ive tried keeping Tomato, Maroon, Clarkii, and Ocellaris in a 90gl and it didnt go so well. Black Ocellaris, Onyx, Percs, Naked, ect.. can usually kept in the same tank and even pair up. Its doable just keep an eye on em. Theres always exceptions, everyone has a diifferent story to tell. It varies from case to case......