“Morphological characteristics of the Ryukyuan paradise fish Macropodus opercularis (Perciformes: Belontiidae) ”, FishTaxa, vol. 18, pp. 1–5, Nov. 2020, Accessed: Jul. 28, 2026. [Online]. Available: http://fishtaxa.com/index.php/FishTaxa/article/view/77