Cover legend: Confocal micrograph of a single lateral line neuromast of a transgenic zebrafish at 5 days postfertilization reveals the localization pattern of Acf7a in hair cells. Actin filaments in the hair cell cuticular plates and circumferential bands are labeled in red by Alexa 546–conjugated phalloidin. Hair cells expressing Acf7a-Citrine (yellow) have fusion protein encircling each cuticular plate and each fonticulus of the neuromast. For more information, see Antonellis et al. (pages 305–312).