The polychetes (Class Polychaeta) are a small group of Annelida. The family, Sabellidae and two species, Manayunkia speciosa and Aphanoneura are listed in the Ohio EPA Aquatic Macroinvertebrate Taxa List, but have not been observed.
The family Aeolosomatidae, has one species listed, Aeolosoma sp., and only one specimen has been observed.
Here is a picture of Aeolosoma sp. in case you run into one:
