Whole mitochondrial genome sequencing and phylogenetic analysis of Gangetic mystus ( <i>Mystus cavasius</i> )

<i>Mystus cavasius</i>, known as Gangetic mystus, is a freshwater indigenous catfish. The present study represents the first-ever complete mitochondrial genome sequencing of <i>M. cavasius</i>. The whole mitochondrial genome size is 16,554 bp (GenBank accession number OR018997). The mitogenome organization consists of total 37 genes, with 13 protein-coding genes, two rRNA, 22 tRNAs, and a D-loop regulatory region. Among these, 28 genes are coded on the heavy strand, while eight tRNA genes and ND6 are encoded separately. Phylogenetic analysis reveals that <i>M. cavasius</i> clusters with other <i>Mystus</i> species and bagrid catfishes. This work contributes valuable insights into structural characterization and phylogenetic relationships.