"Mālama Limu: An Oral-History Case Study in Indigenous Hawaiian Macroalgal Heritage" is the culmination of an ethnobotany research project headed by Brennan Michael O'Brien, a student in the Limu Studies program of Windward Community College. Started in the fall of 2025, his project is based upon the interview of native-Hawaiian cultural practitioner Kumu Mark Sung Alapaki Luke, conducted in investigation of the Islands' cultural heritage surrounding native macroalgae (limu). Using insights from this dialogue (the transcript of which is included in the report), the author details the enduring significance of limu to the Hawaiian people and offers insights on the future of their way of life, both in general and as it pertains to limu practice. Note that from 45:53 - 48:16 in the audio file, there was a lapse in the interview due to technical difficulties; there is no content of substance in this portion of the audio recording, but it has been left to preserve the recording's originality.