Noticed this shell on some live rock so I pulled it off and kept it around when i sold the rest of the rock. Is it good or bad? It is red in color and will move around the tank and up the sidewall and is currently attached underneath one of my frags now. Just wondering if it will do any harm if I put it in the main frag tank. I assume not as its just a filter feeder.
Clam/Molusk?
- Thread starter JordanM
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Crabs McJones
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Looks like a bivalve, good little filter feeder 
