Only comes out at night

pseudorand

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I saw this guy for the first time looking at my tank after lights out tonight. Anyone have any idea? It's hard to see in the pic, but he has a bunch of tentacles flailing off of him.

PXL_20210422_060402318.jpg
 

ScottR

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Hard to tell without a clearer pic. My first thought is a polyclad flatworm
 

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