Hoplolatilus marcosi, the redback sand tilefish, is a species of tilefish native to the western central Pacific Ocean. It is an inhabitant of reefs being found at depths of from 18 to 80 metres (59 to 262 ft) though usually deeper than 30 metres (98 ft). This species can reach a length of 12 centimetres (4.7 in) TL. It can also be found in the aquarium trade.