Lubricogobius exiguus Tanaka, 1915
cool face sometimes

As the common name suggests, Yellow pygmy-goby is small bright yellow goby. Osezaki (Izu peninsula, Chiba) is a famous place where can watch that cutey fish. An old bottle is on a sandy seabed at the depth about -20m, Yellow pigmy-goby is appearing their faces from the mouth of a bottle. Its lovely face is popular for divers, but it also shows a cool face sometimes.