Interesting. I think I have noticed this incipient behavior in my 1.5 inch specimen. It tries to impose on tankmates, of which there are only two gobies, A. yanoi and V. signatus. The gobies hang out in a strongly swept open tidal cave at the foot of the rockwork. The clown leaves its normal station regularly and goes down there clearly intent on driving them away. Of course, it is out of its element and they are in theirs. They just take advantage of rockwork and eddies to cling on and stay put while it gets blown around like thistledown.