Climate change, perhaps the greatest challenge of our lifetime, is having an impact on animal-microbial interactions, a fundamental feature of animal biology. Ryan Hulett is using symbiotic marine invertebrates, like anemones and corals that take up algae into their own cells, to understand how intracellular microbes reprogram host cell fate decisions during heat stress. This work will illuminate fundamental cellular and molecular mechanisms underlying animal resilience in response to global warming.