Jellyfish reveal rapid repair system behind scar-free healing

A decade ago this summer, at the Marine Biological Laboratory, Jocelyn Malamy watched jellyfish cells "walk" toward each other to close a wound for the first time. An associate professor of molecular genetics and cell biology at the University of Chicago, Malamy had received transparent, dime-sized medusae of the species Clytia hemisphaerica from Evelyn Houliston's lab at the Marine Observatoire in Villefranche.