What is this, is it a tunicate?

Keith Schaab

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I was looking at this, it kind of looks like a sponge but it looks more like a mollusc to me and it seems to be moving across the rock (slowly). Never seen anything like it; is it some type of tunicate (do they move positionally)? The spikes open almost like coral polyps.

PXL_20240105_052240330.jpg


A little more zoomed in:

PXL_20240105_054313096.jpg
 

ISpeakForTheSeas

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Welcome to Reef2Reef!

That appears to be a Gold Ring Cowrie, Monetaria annulus. These are reportedly reef-safe and good CUC.
 

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