The complete mitochondrial genome provides crucial information for comprehending gene rearrangement, molecular evolution, and phylogenetic analysis. Here, we have determined the complete mitogenome sequence of Eucleoteuthis luminosa for the first time.

Based on a comprehensive analysis of molecular sequence data, the Sepiidae genera Acanthosepion Rochebrune, 1884; Ascarosepion Rochebrune, 1884; Aurosepina Jothinayagam, 1987; Decorisepia Iredale, 1926; Doratosepion Rochebrune, 1884; Rhombosepion Rochebrune,

Many female squids and cuttlefishes have a symbiotic reproductive organ called the accessory nidamental gland (ANG) that hosts a bacterial consortium involved with egg defense against pathogens and fouling organisms. While the ANG is found in multiple