Gulf of Mexico coastal herrings may become an important alternative fisheries resource for U.S. commercial fisherman. Effects of on board handling on sensory characteristics of chub mackerel (Scomber japonicus) and rough scad (Trachurus lathami) were investigated. Proximate and fatty acid composition of chub mackerel, rough scad, round scad (Decapturus punctatus), round herring (Etrumeus teres), and silver rag (Ariomma bondi) were determined to provide nutritional and product formulation data. Chub mackerel and rough scad had similar sensory characteristics found in other commercial species, which, with proper on board handling, could be maintained during frozen storage. Proximate and fatty acid compositions of the fish varied by species, season, and year.