Video 2. Animated reconstruction of a wild-type neuromast.
This neuromast (WT1) contains ten mature hair cells with hair bundles as well as a pair of nascent hair cells (lavender and gray) that have completed their rearrangement but not yet separated and formed hair bundles. Lateral views demonstrate the beveled hair bundles with stout kinocilia at their tall edges. Hair cells are colored according to their anteroposterior positions following rearrangement: more anterior hair cells in reddish shades and more posterior hair cells in blue. The terminals that form ribbon synapses with the former are delineated in various hues of yellow and orange and those associated with the latter are shaded green and blue. The single efferent terminal is black. All the axons extend their terminal processes though a single orifice in the basal lamina, which is colored purple. The spaces between the hair cells, and those around which the axonal terminals are arrayed, represent the positions of unseen supporting cells. In the second half of the sequence all the hair cells save one are removed to provide a view of the pattern of innervation, which is then further restricted to show the single dominant terminal.