Observations were made on the escape response of Nassarius vibex. This reaction, consisting of a violent flipping movement, is used by the snail whenever certain predatory sea stars or molluscs make contact with it. Contact situations involving the gastropods Fasciolaria tulipa,
F. hunteria, and the sea star Luidia alternata with N. vibex elicited the reaction and were investigated. The escape response is discussed and a possible relationship between righting behavior and escape response is suggested.
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