feather-duster worm

[feth-er duhs-ter]
noun
  1. any tube-dwelling polychaete worm of the families Sabellidae and Serpulidae, the numerous species having a crown of feathery tentacles used in feeding and respiration.
Also called fan worm, feather worm.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018