Abstract
Abstract Carcharhinus brevipinna (spinner) and Carcharhinus limbatus (blacktip) sharks make spectacular jumps and spinning leaps out of the water. Some believe these are: jumping responses to rid sharksuckers (Echeneis naucrates) that attach to their bodies, chaffing, shuttling, or heat hunter- cool rest behaviors. Examination of North Carolina shark data suggests that C. brevipinna and C. limbatus in temperate waters of North Carolina sense changes in abrupt ocean water temperatures. Echeneis naucrates is just along for the ride. Why after fourty-six years of longlining only one Echeneis naucrates occurred on C. brevipinna while many occurred on C. limbatus is unknown. Perhaps something in the skin texture, not shape, of C. brevipinna deters Echeneis from attaching.
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