Lethrinus laticaudis, the grass emperor, is a species of emperor native to the western Pacific Ocean where they occur on coral reefs at depths of from 5 to 35 metres (16 to 115 ft). Juveniles inhabit beds of sea grass and also in mangrove swamps. It can reach a length of 56 centimetres (22 in) TL though most do not exceed 35 centimetres (14 in). This species is commercially important and is also popular as a game fish.