Check out this link from the Alabama board

[Fanof49ASU]

What won't a clown host?
http://reefcentral.com/forums/showthread.php?s=&threadid=1176092

 

[c_stowers]

Wow! Thats interesting...My clown sometimes host in my crocea...but not "in" my crocea like those pics.

 

[gflat65]

That is interesting. My cleaner wrasse used to hang out inside my clam, but it was eating the gills... I'm surprised the clam allows it, but I guess if it's a gigas (my crocea's closed violently when touched) , it has room.

 

[Fanof49ASU]

I wonder if you ran your hand between the clam and the light, could you get it to close on the clown?

: )