Widiansyah, D.A., Fadjar, M. and Zakiyah, U. 2025. Phylogeographic Study of Betutu Fish (Oxyeleotris marmorata) Interpreted Using DNA Barcodes in Three Rivers in East Java Region, Indonesia. International Journal of Marine Engineering Innovation and Research. 10, 1 (Jul. 2025), 213–220. DOI:https://doi.org/10.12962/j25481479.v10i1.4764.