Caprichthys

Caprichthys gymnura, also known as the rigid boxfish, is a species of deepwater boxfish native to the waters of the continental shelf off the western and southern coasts of Australia. It is found at depths from 40 to 200 meters (130 to 660 feet). This species grows to a length of 11 centimeters (4.3 inches) TL. This species is the only known member of the genus Caprichthys.