Abstract
The complete mitochondrial genome of the giant tun shell, Tonna galea (Linnaeus, 1758), was sequenced using a hybrid Illumina and Nanopore approach. The assembled mitochondrial genome is a circular 17,504 bp molecule, encoding the typical 37 genes (13 PCGs, 22 tRNAs, and two rRNAs). Mitogenomic phylogenetic analysis robustly places T. galea as a sister taxon to Tonna dolium (Linnaeus, 1758). Additionally, the analysis strongly supports a close phylogenetic relationship between the families Tonnidae and Bursidae. These findings offer essential genetic insights into the phylogenetic framework of the family Tonnoidea.