Second-order projection from the lateral line, at the level of rhombomeres 1–2. Two large branches, AMc and AMi, extend symmetrically on either side of the midline towards the oculomotor nuclei and nuclei of the Median Longitudinal Fascicle (MLF). More laterally, two ill-defined branches extend to forebrain nuclei (ALc and ALi). A fifth branch extends to the contralateral torus semicircularis (LT). At the anterior edge of the LT branch, a few fibers extend dorsally (asterisk) into the tectum. Dorsal view, composite of several focal planes. The complete Z-stack is shown as Additional file 7. Figure provided by A Ghysen.