clam question

Look at this. I have no idea what's going on, any thoughts on this would be great. I looks like it developed sweepers?
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It is coming off of the mantle. It is right below the intake and the flesh looks like is absorbing it? One of my cleaners is "hiding" possibly a molt but I haven't seen any other signs. Can the dimples on the mantle absorb things like the mouths on lps?
 
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