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Biocube14

Aquarium Advice Regular
Joined
Feb 21, 2011
Messages
95
Location
Monterey bay Cali
Was about 3/4" long 5 months ago. Now almost 3 inches. My guess is some sort of clam or oyster or barnacle. I noticed it opens about 1/8" and I can see dark soft tissue inside. It's sitting on an old snail shell for better pic view.. Any thoughts??
 

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