The masked spinefoot (Siganus puellus), also known as decorated rabbitfish or masked rabbitfish, occurs in shallow, coral-rich areas of clear lagoons and seaward reefs of the Indo-West Pacific region at depths of 10 to 100 feet.

Its body is yellow-orange dorsally grading through pale blue to white below. The body is also covered with wavy blue lines that are vertical anteriorly and horizontal posteriorly. The eyes are masked by a prominent blackish stripe that extends from the bottom of the mouth to the top of the head. As the black stripe passes the eye it becomes spotted.