Ostracion trachys

Ostracion trachys was first formally described in 1975 by the American ichthyologist John Ernest Randall with its type locality given as a patch reef about 800 m (2,600 ft) northeast of Grand Baie on Mauritius.

The plate-like scales that form the carapace are hexagonal in shape, with most of the plates, particularly to the rear of the body and on the back, having a spinule.

The ventral surface of the body is bluish grey and a large white spot with a black margin at the gill slit.

[5] Ostracion trachys is found in the Western Indian Ocean off the Mascarene ISlands of Mauritius and Réunion.

[4] It is a secretive species which lives at depths as 15 and 30 m (49 and 98 ft), hiding in holes and crevices in rocky reefs.