The Pacific fat sleeper (Dormitator latifrons) is a species of fish in the family Eleotridae found on the Pacific coast of the Americas from around Palos Verdes, California, to Peru, where it can be found in stagnant or sluggish fresh or brackish waters or nearby marine waters. Males of this species can reach a length of 41 cm (16 in), while females grow to 39 cm (15 in). Most do not exceed 25 cm (9.8 in). A maximum weight of 1.2 kg (2.6 lb) has been recorded. This species is important to local commercial fisheries and is actively farmed.