Good or Bad anemone or is it a anemone at all?

[Lisakaybaby]

I bought a tank that contained this live rock, tank had been set up around 4 years. Can anyone tell me what is on the rock? It opens in the daytime and will move around.

Thanks for any information.

 

[Mandarin66]

too small to tell :/ wait until it mature?

 

[little_fish]

Hello and Welcome!

Those look like pest nudibranches to me, i would remove them. They more than likely will eat some type of coral you put that tank.

 

[Lisakaybaby]

doesn't appear to be a nudibranch, I think its the picture angle,making them appear that way. They attach and stay in place when they find a spot they like. Sorta look like a pink or brown polyp with a white body. Look at the one in bottom left first picture he's attached.

 

[little_fish]

Perhaps some zoas then? But i have never heard of them wandering. I know they will detach and float away . .

 

[irensing]

looks like ricordea to me

 

[irensing]

look at the polyp in the left picture on the lower left. I don't see how it could be anything else. orange with a green eye....

 

[little_fish]

How big are these things?

 

[Marines_Wife]

looks like ricordea to me

+1 looks like Ricordea yuma Metallic Orange 1 polyp

 

[grumpy]

looks like mojano to me.

 

[Marines_Wife]

looks like mojano to me.

ew I hope not those things are killers......they spread like wildfire an take over everything

Lisa do they move or is it spreading..........

 

[Smitty]

I can't see it well enough to tell...welcome to the site tho.

 

[Jmck]

+1 on the ric, that was my first thought. The green dot in the centre, the texture and the shape.

 

[irensing]

hmmm.....after looking at some pics it might be majano after all, especially if they are moving around the rock. nice call!

 

[reeftanker84]

its a nem for sure,i have one they are very small like less then 1/4" mine moves too if i move the rock,pretty sure its a mojano nem,i havent killed mine yet its in my 10 gal tank,ive even light deprived it with 2700k lights and still it lives

 

[fastrd400]

I'm leaning more toward Majanos as well. Those are not Rics. Take another pic and post when you can see them fully open.

 

[Lisakaybaby]

Okay ya'll this tank was up and running for around 4 years. We purchased it last week, moved it and set back up the same day. All rock was kept under water. Whatever these critters are had been in place long enough that Coralline algae had formed around them, there are marks in it where they were attached. I think the move is what is making them move around, either from a mini cycle or just not liking the location of their rock.They sit down flat like mushrooms but when they move they have a fat white body that actually crawls. Their size is about the same as the end of a pencil eraser some bigger some smaller. No they are not multiplying that I can tell.

 

[Lisakaybaby]

See if these pictures help y ' all out any.