What is this rock that moves?

[rdrink25]

it moves up and down

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[KrisDeitz]

Looks like a muscle

 

[rdrink25]

Is it ok where it is at?

 

[wineman]

Looks more like an oyster to me.

 

[rolo65]

Eat it....

 

[dakota9]

Bi-Valve mollusk or some sort for sure

Harmless, fine where it is

 

[sprinklerman500]

I can see it,I think its pretty cool my self!

 

[moosebranch]

I have 2 of them. Your LR looks similar to mine. Blue Planet LR?

 

[rdrink25]

Yep that's where I got it from.

 

[moosebranch]

LOL cool. Here's one of mine. Bottom left

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