Polyp or baby Medusa worm or extraterrestrial

ErinD

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Any thoughts? I feel like it may be a Medusa worm. Size is about the head of an eraser.

CF114D0E-8FFD-4970-A29F-6B13DE9C3824.jpeg 87A27F5B-4933-4ED5-894E-772A05374F2E.jpeg
 

KJ

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Aiptasia.
 

Just grow it: Have you ever added CO2 to your reef tank?

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