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Bivalve ID


irondragon013

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irondragon013

Just noticed these were alive on a big coral skeleton I have in my tank. This rock spent quite a bit of time in a bucket and cycled in my tank. I'm surprised they are alive. I'm just curious if anybody knows more about them.

 

Closed with feather duster that also popped up today

5385493802_07ec9de754.jpg

 

Open

5384894139_8186be36d3.jpg

 

 

They close surprisingly quick.

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irondragon013

I did a couple hours of digging around with google and came up with the ID as Arca tetragona or a very similar species. Here is a link if anyone is interested: LINK The amount of coralline on these makes it hard to match up.

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