There is a fish whose official name in Japanese is “Ojisan” (Middle-aged guy). Its English name is five-barred goatfish.
Even if it is female or a baby, it is still called “Ojisan”. Because of its unique name, it is a popular fish in Kagoshima City Aquarium. Underneath their mouths, there are two yellow mustaches that they use to look for food in sand. They live and swim with other fish from wrasses. They live in sandy areas and coral reefs of southern Japan, Indian Ocean, and Pacific Ocean south of Wakayama and can grow up to be 30 cm in length.