Thalassema thalassema
- Photograph of this species.
- http://www.marlin.ac.uk/gallery/index.php?spgmGal=Species/Echiura&spgmPic=0&spgmFilters=#pic

David Julian: Urechis caupo research
- MPEG files of Urechis caupo (Echiura) feeding behavior and summary of corresponding paper.
- http://www.zoo.ufl.edu/julian/Urechis.html

Life with Toxic Sulfide
- A talk by Alissa Arp about Hydrothermal Vents, Deep Sea Vents, Seeps and Estuarine Mud--Life with Toxic Sulfide - Taxa included are Pogonophora and Echiura
- http://www.accessexcellence.com/BF/bf01/arp/bf01p1.html

Minor Invertebrate Phyla - Echiura
- Echiurans are marine worms that burrow into mud or sand or live in empty shells.
- http://www-biol.paisley.ac.uk/courses/Tatner/biomedia/units/mino19.htm

Introduction to the Echiura
- Introduction to this small phylum, closely related to the Annelids, from UCMP Berkeley.
- http://www.ucmp.berkeley.edu/annelida/echiura.html