The complete mitochondrial genome of Pabdah catfish, Ompok pabda (Hamilton, 1822) was determined by MiSeq platform. The genome was 16,512 bp in length, in which canonical 13 proteincoding genes, 22 tRNAs, 2 rRNAs, and a control region (D-Loop) were encoded. The overall A þ T (55.10%) content was higher than G þ C (44.90%). Total nine genes were located at the L strand, and remaining 28 genes were at the H strand. The start codon of 12 protein-coding genes was ATG, except for COX1 (GTG). Incomplete stop codon (TAÀ/T-) was identified in six genes including COXII, COXIII, ND2, ND3, ND4, and Cytb. The mitogenome of O. pabda showed highest sequence identity with O. bimaculatus (86%).

The complete mitochondrial genome of the brownstripe red snapper, Lutjanus vitta was determined by MiSeq sequencing platform. The mitogenome of L. vitta (16,498 bp) encoded the typical 13 protein-coding genes, 22 tRNA genes, two rRNA genes, and two non-coding regions (origin of light strand replication; O L and D-Loop control region; CR). Phylogenetic analysis based on the full mitochondrial genome sequences showed that L. vitta is most closely related to L. russellii . The complete mitogenome sequence of L. vitta would provide the information of the genetic biodiversity in Lutjanus fishes, which would be further used for their scientific management in Indonesian waters.

The mitogenome of an endemic catfish Clarias camerunensis was determined from the Cameroon water. This circular mitogenome was 16,511 bp in length and comprised 13 protein-coding genes, 2 ribosomal RNAs, 22 transfer RNAs, and a single AT-rich control region. The heavy strand accommodates 28 genes, whereas the light strand is constituted by ND6 and eight transfer RNA (tRNA) genes. The C. camerunensis mitochondrial genome is AT biased (56.89%), as showcased in other Clarias species. The comparative analyses revealed that most of the Clarias species have 6 overlapping and 11 intergenic spacer regions. Most of the PCGs were initiated and terminated with the ATG start codon and TAA stop codon, respectively. The tRNAs of C. camerunensis folded into the distinctive cloverleaf secondary structure, except trnS1. The placement of the conserved domains in the control region was similar in all the Clarias species with highly variable nucleotides in CSB-I. Both maximum likelihood and Bayesian-based matrilineal phylogenies distinctly separated all Clarias species into five clades on the basis of their known distributions (South China, Sundaland, Indochina, India, and Africa). The TimeTree analysis revealed that the two major clades (Indo-Africa and Asia) of Clarias species might have diverged during the Paleogene (≈28.66 MYA). Our findings revealed the separation of Indian species (C. dussumieri) and African species (C. camerunensis and Clarias gariepinus) took place during the Paleogene, as well as the South Chinese species (Clarias fuscus) and Sundaland species (Clarias batrachus) splits from the Indochinese species (Clarias macrocephalus) during the Neogene through independent colonization. This pattern of biotic relationships highlights the influence of topography and geological events in determining the evolutionary history of Clarias species. The enrichment of mitogenomic data and multiple nuclear loci from their native range or type locality will confirm the true diversification of Clarias species in African and Asian countries.

The complete mitochondrial genome sequence of the Icefish, Chionobathyscus dewitti was determined by the Next Generation Sequencing (NGS) analysis. The complete mitogenome was 17,452 bp in length, which encoded the canonical 13 protein-coding genes, 22 tRNAs, two rRNAs, and two non-coding regions. As shown in the other notothenids, translocation of ND6 and an additional non–coding region were identified, which is different from the typical vertebrate mitochondrial genomes. The C. dewitti was clustered distinctly from the those in the Chinodraco and Chaenocephalus , which supported the idea that this species should be classified in the different genus, Chionobathyscus in the family Channichthyidae.

The complete mitochondrial genome sequence of Dory snapper, Lutjanus fulviflamma, was determined by high-throughput sequencing (HTS) technique. The circular mitogenome of L. fulviflamma was 16,512 bp in length encoding 37 genes (13 proteins, 22 tRNAs, 2 ribosomal RNAs) and 2 conserved noncoding elements; the control region (D-Loop) and the origin of light strand synthesis (OL). Among the protein-coding genes, unusual start codons were identified in ND2, COX1 and ND3 genes and incomplete stop codons were identified in seven genes. Phylogenetic analysis with the currently known mitogenomes in genus Lutjanus revealed that L. fulviflamma was most closely related to Lutjanus russellii with 91% sequence identity. ARTICLE HISTORY