Polychaete Larva
- Photograph of a Magelonid larva.
- http://www.microscopy-uk.org.uk/micropolitan/marine/larva/frame8.html

Trochophore Larva
- Photograph of a Mitraria larva.
- http://www.microscopy-uk.org.uk/micropolitan/marine/larva/frame7.html

Spirobranchus giganteus: Christmas Tree Worm
- Photograph taken in the Caribbean.
- http://www.photolib.noaa.gov/htmls/reef1027.htm

Sandworm and Bloodworm
- A comprehensive study done by the US Army Corps of Engineers on economically significant Polychaete worms. Includes life histories, habitat and toxicology. Published in 1988.
- http://www.nwrc.usgs.gov/wdb/pub/1051.pdf

Guide to Singapore Polychaetes
- Introduction to Polychaetes, list of families, an interactive system for Polychaete identification, glossary, and references.
- http://rmbr.nus.edu.sg/polychaete/

Bristle Worms and their Larvae
- Article by Wim van Egmond on the life cycle and development of these marine worms, nicely illustrated.
- http://www.microscopy-uk.org.uk/mag/artmar99/polych.html