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.
Nikon D700; Nikkor 105mm lens; 1/60 at f32; ISO 32; Two Inon Z-240 strobes.
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