The tube feet of echinoderms attach to surfaces via suction adhesion.

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"Besides mollusks, echinoderm tube feet make use of suction adhesion, as do a wide variety of other aquatic systems--either as the only attachment mechanism or in combination with others. Among terrestrial systems one thinks first of wet ones--frogs for instance. But the mechanism finds use even in arboreal mammals." (Vogel 2003:427)

Comparative Biomechanics: Life's Physical World, Second EditionJune 17, 2013
Steven Vogel

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