Grammicolepis is a monotypic genus of tinselfish, family Grammicolepididae. The only species is Grammicolepis brachiusculus, the thorny tinselfish or deepscale dory. It is found in deep oceanic waters at depths from , but usually between . It is known from many areas off Australia and occasionally caught as by-catch. Records from northwest Europe include one specimen caught off Scotland in 2004 and one off County Kerry, Ireland in 2010.
This species grows to a length of TL. It is a silvery fish with a highly compressed deep body that is covered in vertically-elongated scales.