This database synthesizes trophic information on dinoflagellate and ciliate taxa, emphasizing their crucial roles in marine food webs. The compiled database serves as a valuable resource for understanding the ecological importance of these protists across the global ocean. The database was built from a collection of ecological information and corresponding taxa derived from available literature including observational, experimental, and field-based studies. A full description of the TMD can be found in the Microbiology Resource Announcements Journal (Jones et al. in review).