Why clarkii's are better for anemone.

[Redneck_Boats]

I have a mated pair of tomatoes, skunks, and then just two normal clarkii's and tswo normal ocelaris clowns all in different tanks. The tomato clowns seem to just use and abuse the BTA and use it to death, the clarkii's seem to take excellent care of both the carpet and BTA, skunks could careless and will occasionally go into an anemone and occelaris doesn't go in anything. Anyone know why the clarkii's are the only ones that actually feed the anemone and take care of it? Why don't any on the other clowns actually take care of their anemone for the so called " symbiotic relationship" any thoughts? Thanks