MCS: Lancashire area group

The fan worm in the photograph (right) is possibly Bispira volutacornis (Montagu), a second spiral of filaments is visible just out of focus behind and to the left of the first.

The fan worms have long feeding filaments, which they deploy in graceful spirals or cones to catch floating food particles. Generally fan worms can retract these filaments very quickly and completely into a tube or burrow, distinguishing them from tube anemones.