Complete mitochondrial genome of the Hydrophis melanocephalus slender-necked sea snake (Squamata, Elapidae)

We here report the complete mitochondrial genome of the Hydrophis melanocephalus slender-necked sea snake from Okinawa, Japan. Its length is 17,182 bp, consisting of 13 protein-coding genes, two rRNA genes, 22 tRNA genes, and three non-coding regions, providing the basis for further phylogenetic and evolutionary studies of sea snakes.