- Kingdom: Animalia
- Phylum: Annelida
- Class: Polychaeta
- Subclass: Sedentaria
- Order: Sabellida
- Family: Sabellidae
- Scientific name: Myxicola infundibulum
- Norwegian: mudder-rørmark
This is a rather large bristle worm, reaching 20 cm in length. It has as many as 150 segments and 20 to 40 pairs of tentacles (radioli) along two thirds of the body length. The body color is usually yellow or orange, but sometimes brown or violet. Normally, only the red or orange crown is visible over bottom surface.
It can be found buried in mud or sand on all depths from the sublittoral zone and down to 500 meters.
This bristle worm is registered in the Atlantic Ocean, the Pacific, around Australia and Africa.