Aschwin Engelen (CCMAR, Faro, Portugal) and I are organizing the session Host-microbiomes to protect and restore marine communities of animals, plants and algae in the ASLO-2023 Aquatic Sciences Meeting that will be held from 4-9 June, 2023 in Palma de Mallorca, Spain, ( The session aims to bring together leading scientists who study the interactions of marine organisms with their associated microbiomes using novel state-of-the-art techniques with the possibility of monitoring and improving their restoration success. If you think that you can contribute to this session, then please submit your abstract.