Polynoidae are predators. They live commensally with different animals, such as asteroids, tube worms and corals.

   Bodies of Polynoidae are dorsoventrally flattened. Scales are present. Most species have elytrae alternate with dorsal cirri at the anterior end.

Prostomium

1-3 antennae.

Eversible pharynx with four jaws.

   Marginal smooth or fringed elytrae alternate with dorsal cirri at least at the anterior end.

Prostomium

                                    ( anterior scale removed)  

scale

Parapodia and setae

  Most parapodia are biramous. 

  All setae are simple. Notosetae variously developed.

Parapodia biramous

Parapodia (ventral)

Biserrated capillary setae

Spinule setae