Clowns not getting along

[taziam10797]

So I have 1 Onyx Clown (had 2 one jumped today) and two naked clowns. They used to get along great, hosting anemones like crazy side by side. Then the other day I notice one of the nakeds with shredded fins. And the nakeds arguing with the big Onyx. This was strange because like I said they had always got along. Now the nakeds had always hated the small Onyx (male) and picked on him until he jumped today. Now the nakeds are picking on the big Onyx . What gives, any ideas. I can't catch and seperate because its a 155 with tons of rock and coral.