Rhinesomus triqueter,
the smooth trunkfish, is a species of boxfish found on and near reefs in the
Caribbean Sea, Gulf of Mexico and subtropical parts of the western Atlantic
Ocean. It is the only known member of its genus.The smooth trunkfish has an angular
body sheathed in plate-like scales, growing to a maximum length of 47
centimetres (19 in), though 20 cm
(8 in) is a more normal size. The body is enclosed in a bony carapace and, when
viewed from the front, is triangular in shape with a narrow top and wide base.
The smooth trunkfish is found down to a depth of about 50 m (164 ft) on coral reefs
and over sandy seabeds in the Caribbean Sea, Gulf of Mexico and the western
Atlantic Ocean.