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Click image to see larger image	The upper intertidal zone
Observations	The upper intertidal zone is exposed at low tide.
Explanations	The upper intertidal zone is exposed most of the time and will become submerged only during high tide. This zone is least abundant of the intertidal zones but contains some mollusks, barnacles, and other animals adapted to avoid drying out.
California Standards	Ecosystems Know organisms depend on their environments
National Standards	Organisms and their environments Populations and ecosystems
Related NSF Exemplary Curriculum	Environments Habitats Ecosystems Investigating ecosystems
Related Sets	Main zones of the intertidal zone
Creative Commons License	This work is licensed under a Creative Commons Attribution-Share Alike 2.5 License.
Authors	Katie Hale khale92807@aol.com Biological Sciences, CSUF
Publisher	CSUF Jun 08 2007

This material is based upon work that was supported by the National Science Foundation under Grant No. 0127164 to California State University Fullerton. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.