Overview of the swim bladder-inner ear relationship in E. maculatus. Left lateral view of the anterior body (volume rendering based on micro. CT data) with surface renderings of the swim bladder (green) and the utricular (red), saccular (purple) and lagenar (yellow) otoliths, superimposed. Reconstructions are based on low-resolution micro. CT imaging using the SkyScan 1174 (voxel size 36 μm isotropic). The white frame indicates the section plane of transversal sections shown in Figure 2. Scale bar, 1 mm. micro. CT, microtomography.