The coconut flat moth (Agonoxena argaula) is a moth of the Agonoxenidae family. It was described from Fiji and known also from Guam, the New Hebrides, Tonga, Samoa, Ellice, Wallis, Futuna, and the Palmyra Atoll. It was first recorded in Hawaii in 1949. It is artificially spread by commerce. It is the largest known species of the genus. Adults are yellowish brown with narrow pointed wings. The male moth bears a linear white mark on the forewings. There is much variation in the color and color pattern of the adults.