I need help IDing this! PLEASE!

[Cecily]

I have no idea what it is, and I have a really crappy camera.. It's growing on my red leg hermit crab's shell, and there's another one on my cerith snail.

It's like a white volcano, and the mouth opens and closes.. And a hair-like rake looking arm comes and is getting the little particles out of my water. It's it's bad I want it out! Lol.

Here are some not so good pictures, I'm sorry!

 

[poidog]

no why to tell from those pictures as they are not in focus.
google "pineapple sponge" and tunicate and see if it's one of those.

 

[Cecily]

It's neither of those. It's hard, and not transparent. It has little indented lines going from the base to the top where the little mouth opens and closes.

 

[Cecily]

The top picture actually isn't a bad picture of it.. There's not much to it.

 

[poidog]

hmmm... sorry. Can't ID it without a clear picture. Maybe someone knows what you mean by description.

 

[Cecily]

I'm going to try and snap a better one.

 

[EyeReef]

Interesting. Keep us posted if you find out what it is

 

[sparky5785]

Sweetheart try taking a picture with your phone. Our phones have surprisingly decent cameras.

 

[Cecily]

Here's a better picture..

 

[BADGUS]

It's a barnacle of sorts.

 

[lunacris]

by chance is the outside of it hard hole at the top

 

[Cecily]

It's a barnacle of sorts.

Should I leave it, or remove them? There's 2 and they're both hitchhiking on some shells.

 

[Cecily]

by chance is the outside of it hard hole at the top

Yes, it's hard and has an opening and closing hole at the top.

 

[EricTheRed]

I have one of those. The "rake" looking thing comes out of the hole and twists around and then goes back into the hole, right? I've had one living on my torch coral. In fact the torch actually grew around it. Been there for years and never hurt anything. I'd leave it.

 

[Cecily]

Yes! It just goes in and out for a few minutes and then goes back in for a while. Thank you so much!

Do they grow?

 

[lunacris]

looks like a keyhole limpet

 

[EricTheRed]

Yes! It just goes in and out for a few minutes and then goes back in for a while. Thank you so much!

Do they grow?

Mine hasn't gotten any bigger in 2 years.

 

[Cecily]

looks like a keyhole limpet

I definitely don't think that's what it is. I just googled pictures. It's stationary on my hermit crab's shell, and a cerith.

 

[Cecily]

Mine hasn't gotten any bigger in 2 years.

I was just reading about them and it said that the only real problem they can cause is if they reproduce crazy.. But they will rarely get large enough to in a tank because they are filter feeders. Idk how accurate that information is, but - I'll give them a chance because I think they're cool.

 

[DanSreef]

+1 Barnacle... They come in as hitchhikers... They are kind of cool. If you have enough food in your water column you can keep them alive. They won't hurt a thing.