Genus Polycirrus refers to a group of marine annelids that belong to the family Terebellidae. These worms are characterized by their tube-building behavior and have a distinct feature of numerous cirri or hair-like structures on their body. Synonyms for Genus Polycirrus include Terebellides, Terebella, and Terebellopsis. The group includes approximately 60 species of polychaetes that can be found in various marine environments. These worms play a vital role in the ocean's ecosystems as they are known to be important detritus feeders and can aid in nutrient cycling. Knowing different synonyms for Genus Polycirrus can help scientists to communicate effectively and streamline their research.