University of California
Ucmp: Introduction to the Polychaeta
University of California Berkeley offers a good introduction to the world of polychaeta or marine worms.
Regents of the University of Michigan
Animal Diversity Web: Class Polychaeta
Resource provides a general description of marine worms, including sand worms, tube worms and clam worms.
CK-12 Foundation
Ck 12: Biology: Annelids
[Free Registration/Login may be required to access all resource tools.] Discusses characteristics of annelids like earthworms.
American Museum of Natural History
American Museum of Natural History: Giant Tubeworms O Logy Card
Flip over this interactive OLogy card to find fast facts, questions and answers, and similar bite-size pieces of information the giant tubeworm.
Canadian Museum of Nature
Canadian Museum of Nature: Sea Worms
Several species of sea worms are described here - the peanut worm, the priapulid worm and the spoon worm - all of which are found in Canadian waters.
Australian Broadcasting Corporation
Australian Broadcasting Corporation: News in Science: Antarctic Reveals Treasure Trove of Life
From ABC News in Science, Maggie Fox's article examines research connected to the various species of life discovered in the "dark waters around Antarctica." These findings include sponges, crustaceans, and new worms.
Wikimedia
Wikipedia: Hagfish
This site from the Wikipedia Encyclopedia provides a basic description of the characteristics of the hagfish. Also includes a chart that contains scientific classification information. Links are provided throughout for additional...
Other
Marine Invertebrates of Hawaii Phylum Annelida
Colorful pictures and short descriptions of several marine worms are available here.
Science Struck
Science Struck: Decomposers in the Ocean: Role and Examples
Describes five different types of decomposers that feed on decaying organic matter in the oceans and that are at the bottom of the ocean food chain.