Cover image

Cover: This image is a composite of two different life stages of the hydrozoan jellyfish Clytia hemisphaerica; medusa (top), which releases gametes daily in a light-dependent manner, and vegetatively growing colonial polyp (bottom). An improved whole-life cycle culture protocol has been developed to use it as a developmental genetics model, and is described by Lechable and colleagues in this issue. Photos are taken by Alexandre Jan and Marion Lechable. Image licensed under a Creative Commons Attribution 4.0 International license.