Twin Fan Worm

Bispira volutacornis

Bispira volutacornis, sometimes known as the twin fan worm or spiral fan worm, is a species of tube worm inhabiting the shallow sublittoral zone of the eastern Atlantic Ocean. It has a parchment-like tube with a mucoid outer layer, often coated with mud or silt. The tube is usually concealed in a crevice, and the worm can retract into it when disturbed.

Scientific name
Bispira volutacornis
Family
Sabellidae