Fake clownfish? I think Ocellaris clowns are sometimes called False Perculas, but I'm not sure. Could it be a decoration? I'd imagine there are tons of tacky little Nemo figurines one could throw in a tank..
Ocellaris Clownfish are also known as False Perula Clown, Fake Percula and False Clown Anemonefish.
I think that the term 'fake clownfish' is possibly used when describing a specimen that has been captive bred and tank reared rather than wild caught. I'm not 100% certain about if this is true, but I'm sure I read it somewhere ???