Isacia conceptionis, the Cabinza grunt, is a species of grunt native to the Pacific Coast of South America and Nicaragua. It can be found at depths of 0to in areas with rocky or sandy substrates. This species grows to 60cm (20inches) in TL, with a maximum known weight of 1.83kg (04.03lb). It is important to local commercial fisheries. I. conceptionis is the only known member of its genus.