This image shows a Z-projection of all the sensory axon arbors that innervate the skin of a larval zebrafish tail and the differential activation of Src Family Kinases (SFKs) within those axons. Immunostaining for phosphorylated SFK in transgenically-labeled somatosensory axons combined with 3D image analysis allows visualization of different levels of SFK activity within portions of the axon from high levels (white/red/orange) to low levels (purple/blue). Tuttle et al. identify a new role for SFKs in the maintenance of these sensory axons within the skin. For more information, see the article by Tuttle et al. (pages 6835–6847). Cover image: Adam Tuttle.