Need id on this please

The brown looking egg thing between my polyps. I walked up to the tank and it snapped closed. Only way I seen it was it made a little dust storm. I then watched it and it moved a little then opens. Any one know?

 

Hi and welcome to 3reef.

Can you please circle the item you need an ID on.

If not, my uneducated guesses are:

1. Bi-valve of some sort.
2. Barnacle.
3. Tunicate

 

OK, saw a larger image somewhere else.

Probably Oyster of some sort, harmless.

 

Took pic to Lfs also they have no clue.

 

My first salt tank and am enjoying all the crazy things I am finding in it. Lol

 

Well here are some nice ID links for you. I keep a magnifying glass next to my tank, I like all the strange stuff as well.

LionfishLair.com - Hitchhiker Guide to your Aquarium
Live Rock Hitch Hikers

Enjoy

 

Thanks for your time. It looks to be a filter feed of some sort. I tried to pull it off and not happening. It is soft to the touch. It will get to live for now.

 

Most things are harmless. If it's soft and leathery to the touch than it's a tunicate probably, looks like an Oyster, guess I will never know for sure.

And you're welcome. ;D

 

I think the softness may be due to the overgrowth. It's shaped like an Ark Clam, and appears to be embedded into the rock the same way an Ark Clam would be embedded. They often move when they sense movement or change in lighting (usually when a shadow passes over them).

Cheers,



Don

 

That makes sense.

Thank you.