Alwi, Djainudin, Sandra Hi. Muhammad, and Irwanto Tae. “Morphological Characteristics and Ecological Index Sea Urchins (Echinoidea) in Wawama Village Water Morotai Island District”. Jurnal Sumberdaya Akuatik Indopasifik 4, no. 1 (May 13, 2020): 23–32. Accessed May 10, 2025. https://www.ejournalfpikunipa.ac.id/index.php/JSAI/article/view/95.