Help with a Coral Identification

[SkumScraper]

What is this? It's a hard frag is about 1" tall. It is growing very slowly but seems to be doing fine in water flow under T5's

http://tomatosite.com/images/unknown_coral.jpg

[Fishieness]

looks to be a hydnophora to me. Just without the polyps out. Perhaps a rigida? But it is hard to tell with the picture/so early off.
Some people classify it as an LPS, while others do an SPS. I normally put it in the sps category, but that is just me. It likes and will do well under intense lighting and flow, is a fast grower, has a powerful sting (it will win against any other sps), and is probably the easiest "sps" i've ever dealt with.
good luck with it :)

[SkumScraper]

Thanks fishieness. After you gave me the scientific name I was able to find more info on the web.

I found that the common name is "Horn Coral". There doesn't seem to be very much of this available online.

[Ace25]

I agree with Fishiness, a Hydnophora, and as you found out, horn coral by common name.

One of the most aggressive corals out there. Only one stronger is a galaxia. Do not place it close to any other corals (3" diameter) because it has long sweeping tentacles that come out at night and usually has deadly effects on most other corals.

I had a nice big one a while back, killed about $1000 worth of other corals in the tank before my Condi anemone took it out. Expensive warfare going on in my small 29G when I was first getting into corals and didn't understand placement too well. Here was what mine looked like with the polyps out.

http://farm4.static.flickr.com/3199/2791459506_781b67fe5a.jpg

[Fishieness]

One of the most aggressive corals out there. Only one stronger is a galaxia.

In all the ones i've kept, they've gotten completely wrecked by just about every other lps including galaxias, euphyllias, and even duncans (there were a LOT of heads though). But as i said, it will destroy any sps.

[kay-bee]

I had an encrusting hydnophora destroy a mushroom 2 or 3 inches away from it within an hour of placing it (the hydnophora) in the tank. Rather than sweeper tentacles, it projected a 'net' or web of clinging filiments which rapidly converted the mushroom to a mass of slime.