Perinereis cultrifera (Marine Ragworm) is a species of segmented worms in the family ragworms. They are open-ended ventilators. They are omnivores. Individuals can grow to 250 mm. They have parental care. They have no sexual metamorphosis. Reproduction is semelparous, iteroparous, and gonochoristic. They rely on drag powered swimming to move around.
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