Marphysa sanguinea (Red Rock Worm) is a species of segmented worms in the family Eunicidae. Individuals can grow to 600 mm. Reproduction is iteroparous.
Definition: The marine benthic biome (benthic meaning 'bottom') encompasses the seafloor and includes such areas as shores, littoral or intertidal areas, marine coral reefs, and the deep seabed.