Zebrafish sensory organs, such as the retina and lateral line organs, have the remarkable capacity to regenerate their sensory receptors following damage and death. The non-neuronal glial cells, i.e. the Mueller glia in the retina are induced to proliferate and to provide new photoreceptors. A regenerative response requires the damaged/dying photoreceptors to communicate their impaired integrity to the neighbouring cells, which in turn have to sense and integrate such signals. My research focuses on unraveling the initial inter- and intracellular signaling mechanisms that trigger Mueller glia in the zebrafish retina to undergo proliferation.