biostudies-literatureUnknown2Talamantes MThe use of cannabidiol oil derived products has dramatically increased in popularity and is predicted to grow steadily over the next decade. Given its relative stability, cannabidiol is likely to accumulate in the environment and affect aquatic animals and their host-associated microbiomes. Here, using zebrafish larvae, a model system in environmental toxicology, we show that passive exposure to a concentration as high as 200 µg/L cannabidiol oil did not affect larvae survival and had limited effects on their host-associated microbial communities. We found that the changes in community structure were limited to a decrease in two sequence variants identified as <i>Methylobacterium</i>-<i>Methylorubrum</i> sp. and one ASV identified as <i>Staphylococcus</i> sp., as well as the increase of one sequence variant identified as <i>Chryseobacterium</i> sp., a bacterium commensal to zebrafish. More importantly, we found that cannabidiol oil did not affect the overall richness and diversity of the exposed fish microbiomes. These results suggest that passive exposure to cannabidiol oil is unlikely to impact aquatic organisms in significant ways.Current research in microbial sciences100045https://www.ebi.ac.uk/biostudies/studies/S-EPMC8610293biostudies-literaturePassive exposure to cannabidiol oil does not cause microbiome dysbiosis in larval zebrafish.PMC8610293Pinto ATalamantes MPerron GGSchneeberg SRfalsePassive exposure to cannabidiol oil does not cause microbiome dysbiosis in larval zebrafish.The use of cannabidiol oil derived products has dramatically increased in popularity and is predicted to grow steadily over the next decade. Given its relative stability, cannabidiol is likely to accumulate in the environment and affect aquatic animals and their host-associated microbiomes. Here, using zebrafish larvae, a model system in environmental toxicology, we show that passive exposure to a concentration as high as 200 µg/L cannabidiol oil did not affect larvae survival and had limited effects on their host-associated microbial communities. We found that the changes in community structure were limited to a decrease in two sequence variants identified as <i>Methylobacterium</i>-<i>Methylorubrum</i> sp. and one ASV identified as <i>Staphylococcus</i> sp., as well as the increase of one sequence variant identified as <i>Chryseobacterium</i> sp., a bacterium commensal to zebrafish. More importantly, we found that cannabidiol oil did not affect the overall richness and diversity of the exposed fish microbiomes. These results suggest that passive exposure to cannabidiol oil is unlikely to impact aquatic organisms in significant ways.2021-01-01T00:00:00Z2021 Dec2024-11-19T15:39:35.919Z2022-02-11T13:23:50.712ZS-EPMC86102933484133610.1016/j.crmicr.2021.100045