I just got my first hammer and was wonding how long the stinging tentacles might be. There are some corals in the near, but not too close, vicinity. Just being cautious.
I've got a hammer and they never come out. I can tell you that my bubble coral extends his and they are from 2 to 3 inches long. I know these two corals are similar.
They don't emit special stingers, just their regular tentacles: they can concentrate [so I've heard] nematocysts in those nearest undesirable neighbors, and those tentacles can double their regular length to reach out and touch something.
They are, however, perfectly compatible with frogspawn, another euphyllia of like behavior, and can commingle tentacles with it with no damage at all.
One of my hammers is in a high flow area. It's stingers can be almost 3" long. The other one (same mother colony) is in a low flow area and it doesn't have stingers at all.
feeder and sweeper tentacles both "sting" but are used for different purposes. I once had a E. ancora that developed 6" sweepers in order to sting a neighboring coral.
I have a branching hammer I wish I never would have put in my tank. It's growing way to fast and if I'm not careful it stings the crap out of the inside of my arm when I'm cleaning the tank. I don't notice it when it happens, but I get huge itchy, blistering burn marks a couple hours later. It's so vicious the Acros growing near it have literally changed the direction of their growth to avoid it without ever making contact. Anyone else have this experience?
This thing would probably burn a whole through the shipping bag and escape back to my house to kill me in my sleep. All kidding aside, I am going to have to do something with it soon because it's starting to become a nuisance. It even has the little baby hammer buds sprouting from the base.
The branching hammer (paraancora) I have started life off as 3 heads and one got a brown jelly infection and I had to cut it off. Now the colonly is 10 heads strong after 1 year and I have loads of buds on the base. Having said that it is near an alveopora which has longer reaching polyps and neither seem to be bothered or at war with each other (although its possible they cant actually reach each other since they are a few inches apart). Does anybody know if all euphyllia species can "touch" polyps together happily (i.e a glabrecens (torch), the paraancora and an ancora) ??? I would imagine the torch would be a bit miffed and sting the hammer corals right ?
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