The darker ones do not associate with anemones I believe. I bought one when I originally set up the tank, he lived for a few months. I got another one about 9 months back and still have him. Both were the darker variety because I do not have an anemone. Very cool cryptic little creature. Dont expect to see him out in the open often, but when only the actinics are on I can usually find him under an overhang or near a cave.