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Sea star using tube feet to open a mussel at the California rocky intertidal zone
Observations A sea star's tube feet, located on the underside of its body, use water pressure to open up any gaps in a mussel's (or other shelled animal, such as a clam or oyster) shell.
Explanations The concept that a sea star is a predator is hard to grasp because it moves slowly. It preys on other slow-moving animals by using its tube feet (like suction cups) to grasp the animals shell and open it.
California Standards Know organisms depend on their environments
Organism roles
Know animals eat plants or other animals
Population functions - producer or consumer
Ecosystem energy exchange
Food chains and food webs
National Standards Characteristics of living things
Organisms and their environments
Populations and ecosystems
Related NSF Exemplary Curriculum Animals two by two
Living things
Animal studies
Investigating animal needs
Investigating ecosystems
Related Sets

Similarities and differences of predators

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Katie Hale
Student, Biological Sciences, California State University, Fullerton


Biological Sciences, Nancy Pelaez, CSUF
Dec 29 2006



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.

VIDA: Video and Image Data Access