What is this?

I really want to find out what this is. I am positive it's an anemone, I just don't know what kind. I posted before and some suggested a frilly shroom. I really don't think it's a shroom.

First, it has a much longer foot than any shroom I've seen frilly or otherwise. It deflates similar to other anemones (I know shrooms deflate, mine seem to be very cranky at night and shrivel up - this ... collapses, retracts tentacles), sometimes both in the morning and afternoon. It also has sticky tentacles (although very small, like little hairs) - similar to a fuzzy anemone. It captured and ate a mysis shrimp I fed it the other day. It's since moved a bit out of the crack it was in originally so you can better see the foot. Moved maybe 1 inch. Also it's grown a bit, seems happy so far. I like it, and don't want to get rid of it - just curious what kind of anemone it is.

 

thats cool whatever it is zach. im curious to see what it is too. just showed up recently?

 

Looks like a leather coral, such as a mushroom leather.

 

Nah, got it with a small piece of rock. It's been in there 2, 3 weeks.

Doesn't seem like a pest, it hasn't spread - it did sting and kill 3-4 yellow polyps that were very close to it - another reason I suspect anemone, as no mushroom I've ever encountered killed anything. Which is typical of an anemone, doesn't bother me, will just keep corals away from it. I do hope it keeps growing, as it's quite pretty (hard to see in pic, lots of green and yellow tipped tentacles, but only on the outer ring of tentacles) and really likes the flow. I keep it in a higher flow area and it sways constantly and has not moved except for 1 inch, out of a crack. It's been where it's at since.

 

I forgot to mention in the original post - there were 3-4 yellow polyps which it stung and killed. Do mushroom leathers have the capability of poisoning or stinging? Never kept one of them. Just a Kenya tree which is growing like a weed.

 

They can poison other corals, such as coral warfare. They can produce a toxic substance that will affect other corals.

 

Cool - very well may be a leather then Thanks!

 

I don't think that is a leather coral.

It really has the appearance of a fuzzy shroom, with a foot like an anemone. If it moved, it is an anemone, as corals really don't move once attached. fwiw, fuzzy shrooms will eat fish if they can. I used to feed my fuzzy's fish food and they would close up on it like an anemone. Also, I have never seen an extended "foot" like that on a fuzzy. Even under subdued lighting they don't do that, and you have 2x25o of MH on it, so that can't be a reason.

I have heard of "mini carpet anemones", maybe this is one? it is pretty neat regardless of what it is.

 

My first thought......

 

That is exactly how my giant mushrooms started out. It had a green base/ foot and different colored tips. It went from like an inch into like 10" and kept splitting. I never seen my giant mushroom "sting" anything.