Complete mitochondrial DNA genomes for two northeast Pacific mesopelagic fishes, the Mexican lampfish () and black-belly dragonfish ().

Mesopelagic fishes are an important component of marine ecosystems, providing an important link between lower and higher trophic levels. This group of fishes are also highly abundant and make up a large portion of the marine vertebrate biomass. Here we report on the full mitochondrial sequences for two common mesopelagic fishes from the southern California bight: the Mexican lampfish (Actinopterygii: Myctophidae) and the black-belly dragonfish (Actinopterygii: Stomiidae). showed previously reported gene rearrangements for the Myctophidae. Phylogenetic analysis grouped with other Stomiiformes and within the Myctophiformes.