What does it sound like when culture, science, and music harmonize? The Symphony of the Hawaiʻi Seas project integrates moʻolelo (stories), marine science, original orchestral compositions, and animation to cultivate ocean literacy and environmental stewardship among 4–12th grade students in Hawaiʻi. Designed as the third installment in a symphonic educational trilogy, this initiative expands upon the success of Symphony of the Hawaiian Birds and Symphony of the Hawaiʻi Forests, providing an immersive, culturally-grounded STEAM experience. The project engages multidisciplinary collaborators from the University of Hawaiʻi at Mānoa, local artists, locally-renowned composers, and marine scientists to create five symphonic movements that draw from Hawaiian genealogical stories and marine science, paired with animation and NGSS (Next Generation Science Standard)-aligned lesson plans.  Project outcomes completed during this phase include development of six educational modules (one for each symphonic movement) built around existing NGSS-aligned marine science lesson plans, moʻolelo, and a Voice of the Sea episode. A publicly accessible website was also designed to host these resources, along with registration for event attendance and a request form for educators to invite guest scientists based on specific movement themes. Additionally, a docent script was created for NOAA’s bioacoustics laboratory to guide public tours focused on marine soundscapes and the vocalizations of cetaceans.