these are not different species, they are just different color morphs. that said, it is also possible for clowns to inbreed; I have seen several marron/ ocellaris hybrids, and I belive I saw a maroon/ tomato as well. I have also seen many ocellaris/ percula hyrbrids (I mysef belive I have one, it was sold as a ocellaris, but it had both ocellaris and percula characteristics).