“Spiral” by Marco Gargiulo Sabella spallanzanii is a species of marine polychaete, also known as a b
“Spiral” by Marco Gargiulo Sabella spallanzanii is a species of marine polychaete, also known as a bristle worm. The worm secretes mucus that hardens to form a stiff, sandy tube that protrudes from the sand. It has two layers of feeding tentacles that can be retracted into the tube, and one of the layers forms a distinct spiral. -- source link
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