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Manabung, D.F., Lumingas, L.J.L. and Salaki, M.S. 2020. Morphometrics, gonad index, intestine index and latern index of sea urchins, Tripneustes gratilla (Linnaeus, 1758) Tiwoho and Kampung Ambong Beach, North Sulawesi. Jurnal Ilmiah Platax. 8, 1 (May 2020), 126–139. DOI:https://doi.org/10.35800/jip.8.1.2020.28600.