National Geographic
National Geographic: Marine Ecosystems and Biodiversity
A collection of three lessons where students learn about abiotic factors in marine ecosystems, about marine food chains and biodiversity, and about marine food webs and trophic levels. Includes handouts, website links, and a vocabulary...
Smithsonian Institution
Smithsonian Education: Ocean Planet
A series of lesson plans designed to be used with the Smithsonian Ocean Planet exhibit (available online). Lesson topics include marine ecosystems, pollution of ocean water, animal strandings, and literature.
CK-12 Foundation
Ck 12: Earth Science: Marine Food Chains
[Free Registration/Login may be required to access all resource tools.] Describes the marine food chain.