Ahhhh, very interesting, so they are natural hosts.
I find it fascinating how local conditions can cause different behaviors.
I've been diving in Moalboal quite a bit, and if I only dove there I'd swear that BTA's only host tomato clowns, and Heteractis crispa only host pink skunks, because that's all I've seen there, but from diving in other places I know that's not the case. I do wonder why it's like that though.