I'm starting to think that reefers are exaggerating about aggressiveness of many corals. I have both a large frogspawn and a 2 polyp hammer coral in my tank, and I have yet to see the infamous "sweeper tentacles" that the two of them supposedly have. I have seen the candycane's super small tentacles, and the favia's 1inch long sweepers... but never the "scary" sweepers that all the "care" websites talk about.