Bulged neurites associate exclusively with hair cells of identical polarity (in 12 of the 14 analyzed samples).

Each sample corresponds to a 7 dpf SqET4 larvæ neuromast stained with a blue-fluorescent phalloidin to reveal stereocilia and innervated by a single-labeled (mem-TdTomato) afferent neuron. Number of hair cells of different polarities innervated by single afferent neuron is shown in each sample. Polarity ‘A’ is opposite to polarity ‘B’.