Prof. Peixoto is a pioneer on the development of probiotics for corals. Her research has outlined the protocols and proved the concept that the use of coral probiotics can increase the host’s resilience and resistance against environmental threats. This pioneering work has contributed to pave the way for new approaches to reveal and explore mechanisms of marine microbiology and symbiotic interactions. Her research addresses the diversity, ecological role and biotechnological potential of microorganisms associated with marine organisms. She also seeks to investigate and understand key symbiotic mechanisms promoting the host's resistance and resilience against different impacts, as part of her projects on coral reef protection, restoration and rehabilitation. In addition, as the vice-president (August 2022-2024) and President (2024-2026) of the prestigious International Society for Microbial Ecology (ISME), founder and co-chair of the Beneficial Microbes for Marine Organisms network (BMMO), member of the council (and fellow) of the International Coral Reef Society, co-chair of the Coral Conservation Committee for the International Coral Reef Society (ICRS) and member of the Scientific Advisory Board of the G-20 Coral R&D Accelerator Platform (CORDAP), she promotes collaborative work and contributes on powerful international platforms to promote science-driven solutions to protect coral reefs.