Emerald Crab with Tendrils

redpine42

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So over the last 4 or 5 days we've notice one of the Emerald crabs legs is covered in a pink fuzz that looks like coral tendrils. I've tried to capture it in photos below. Any idea what it is?

crabfuzz1.png Crabfuzz2.png
 

KJ

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Look like hydroids.
 

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