Alphestes immaculatus, also known as the Pacific Mutton Hamlet, is distributed within the eastern Pacific and ranges from the northern Gulf of California (Mexico) to southern Peru, including the Galápagos Islands and occurs in some protected areas throughout its range. It is more common in north of its range and becomes less common in the southern extent of its range where Alphestes multiguttatus becomes the more common of the two species.
Pacific Mutton Hamlet are a cryptically coloured, secretive species that inhabit seagrass and rocky reef areas. Individuals are sedentary during the day, hiding in crevices or lying among seaweed, and rely on their effective camouflage to escape detection. It sometimes partly covers itself with sand.
Alphestes immaculatus are nocturnal predators that feed mainly on benthic crustaceans.
Species: Alphestes immaculatus
Alphestes fasciatus Hildebrand, 1946
Alphestes galapagensis Fowler, 1944
Alphestes immaculatus Breder, 1936
Epinephelus afer (non Bloch, 1793)