Page 16 - (DK) Ocean - The Definitive Visual Guide

FILTER-FEEDING WITH FEATHERS
Instead of moving around in search of food, many marine animals
spend their lives fixed to the sea bed, collecting food as it drifts
past. These feather-like funnels are actually part of the body of a
worm. The worm beats tiny, hair-like structures to set up a current
through the funnels and then traps food from the moving water.