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.