Chaetopterus longipes is a highly gregarious parchment worm that forms aggregations of hundreds of worms. It occurs in the Indian Ocean and the Red Sea.
↑Nishi, E. (1996). "Dense aggregation of Chaetopterus longipes Crossland, 1904 (Chaetopteridae, Polychaeta) in coral reefs at Okinawa, Japan". Natural History Research. 4: 41–47. doi:10.13140/2.1.3180.0005.
↑Nishi, E.; Hickman, CP Jr; Bailey-Brock, J. (2009). "Chaetopterus and Mesochaetopterus (Polychaeta: Chaetopteridae) from the Galapagos Islands, with descriptions of four new species". Proceedings of the Academy of Natural Sciences of Philadelphia. 158 (1): 239–259. Bibcode:2009PANSP.158..239N. doi:10.1635/053.158.0113.