Fig. 7. Fibre density as a function of bell height. The density of radial fibres decreased with body size in all areas of the bell. There was no significant difference in the slopes between regions, so data were pooled and a single regression plotted, together with its 95% confidence intervals (broken lines). The slope of the line is n=322–5.5h (mm^–2). The fibre density of the `standard' jellyfish (bell height = 20 mm) is predicted to be 212±34 mm^–2.