Sabellastarte Magnifica is a bristle worm from the family Sabellidae. The worm's body consists of a head, a cylindrical, a segmented body and a tailpiece.

The head consists of a prostomium (part in front of the mouth opening) and a peristomium (the part around the mouth) and bears paired appendages ( palps, antennae, and cirri ).

Sabellastarte Magnifica was first described scientifically by Shaw in 1800.