Why do we keep Euphyllia and Hydnophora?
 

Between my Hammer, Torch and Green Hydnophora I can't count how many corals I've lost to them. Fish bumps coral; coral tips over; lands on one of these three terrorists; dead coral. Grrrrr!
Aside from maybe a big Bubble Coral, Euphyllia sp. and Hydnophora sp. have to pack the most potent sting. I don't know how many times I've threatened to make reactor food out of them.

War
 

Had a hydnophora get "bumped" into my large torch, torch won.

I had a hammer win in a sweep tentacle fight versus my hand. My hand was a blistered mess for 2 weeks. I think both the hammer and I were surprised as all hell.

My Torch is probably 10" to 11" across. An Acro colony toppled and landed upside down in it. At the most it was there for a couple of hours. Lost 90% of the coral. Potent buggers.

LOL, I learned about hydnophora a long time ago. Brad gave me a piece and I swear he was cackling the moment I left. Damned thing stung anything within 8" of it. I ended up either turfing it or passing it on to the next unlucky customer. Never had much problem with euphyllia though, mind you I haven't kept them in years, I never have enough room in the big tank but I have a frogspawn in my nano.

I should assume you don't want the frag I mounted today?? It's purdy!!

I can't say much about Hydnophora (maybe some day) but I haven't ever had much problem with my wall hammer. It's a really nice coral too (and pretty easy :P). It is fairly isolated though. I have a feeling my little Favia is worse when it comes to aggression.

I've never lost an entire colony to my hydnophora or euphyllia... the trick is to not jamb pack every square inch of your tank with coral and leave a little room for them to grow. Some of the tanks I see online make me scratch my head. I recall a 20 gal nano with more specimens in it than I have in my 120gal!

Galaxea and Platygyra are the two problematic ones in my book.

I had a torch that could put out a 12" sweeper (that's 12" more then the normal length of the tentacles) and take out everything in it's path....including me. If I had kept it, I wouldn't be able to put anything else on the one side of my 175g tank :lol:

Man out smarts coral by gluing it down.