NOAA
Noaa: Estuaries 101 Curriculum: Hooray for Horseshoe Crabs
Learn about the anatomy and ecological relationships of the horseshoe crab.
PBS
Pbs: Nature: The Fascinating World of Jellies
Learn about the mysterious jellyfish blooms that have occurred in the world's oceans. Because the resulting alteration to the marine food web has had devastating effects, researchers grow and study jellyfish at the Monterey aquarium....
Other
Marine Invertebrates of Hawaii Phylum Annelida
Colorful pictures and short descriptions of several marine worms are available here.
