jess; regarding your posts I do know people (my son included that keep smaller puffs in their reef tanks- his is a Pork). All books and web sites that discuss Puffs will say not reef compatiable, but again some people push that envelope and do ok. They will eat inverts and I suppose if hungry will nibble on corals and that is the gamble one takes. My son swears his does none of the above but he feeds it well. The main problem I see is that as they grow they will most likely knock things over and for sure nibble on them. A Valentini gets only 3 to 5 inches but they to will eat inverts and nibble other things.