Sarcocheilichthys biwaensis; Biwa oily gudgeon
A species of cyprinid fish endemic to Lake Biwa, Japan. Scientific name: Sarcocheilichthys biwaensis.
The Biwa oily gudgeon is a freshwater fish that lives only in Lake Biwa.
The name combines 油 (abura, 'oil') and 鰉 (higai, a type of gudgeon), likely referring to its oily flesh or appearance. The exact origin is uncertain.