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Fig. 5. The relationship between the % decrease in heart rate (HR) and %
hyperinflation. Each point represents the averaged data of one animal. Open
symbols indicate animals that missed reaction stages in 50% or more of trials,
closed symbols indicate animals that showed all reaction stages in more than
50% of trials. The average chromatic index is represented by the shape of the
symbol: circle=1, diamond=2, triangle=3, square=4. The outlying closed circle
represents cuttlefish #22, who showed different chromatic (Mantle darkening)
and postural responses from the other cuttlefish.