URL:https://upload.wikimedia.org/wikipedia/commons/thumb/c/c7/Naturalis_Biodiversity_Center_-_RMNH.ART.462_-_Anguilla_japonica_Temminck_and_Schlegel_-_Kawahara_Keiga_-_1823_-_1829_-_Siebold_Collection_-_pencil_drawing_-_water_colour.jpeg/240px-thumbnail.jpeg
掲載元:https://commons.wikimedia.org/wiki/Category:Anguilla_japonica