The Maroon Clownfish is one of the most strikingly beautiful of all the clownfish. Clownfish make ideal companions in mixed fish and invertebrates systems. The Maroon Clownfish may be one of the most aggressive of the clownfishes. They will not get along well with any other clownfish in the same tank unless they are a mated pair. he Maroon Clownfish is generally easy to keep. Feed all kinds of live, frozen, and flake foods.