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Macropodus erythropterus is a small well-known aquarium fish. In the present study, the complete mitochondrial DNA (mtDNA) sequences of M. erythropterus were first determined. The mtDNA of M. erythropterus (GenBank accession no. KU215670) was a circular molecule of 16 495 bp in length with two ribosome RNA (rRNA) genes, 13 protein-coding genes, 22 transfer RNA genes, an L-strand replication origin and a control region (CR). The entire mitogenome nucleotide acid was 15.71% for G, 29.66% for A, 28.37% for T and 26.26% for C with an A + T content of 58.03%. And the A + T contents of 12S rRNA, 16S rRNA and CR were 55.63%, 57.66% and 66.79%, respectively. This study provides basic molecular data for studying the conservation biology, phylogenetic and evolutionary analysis of Macropodusinae fishes.

Sinibotia pulchra (Cypriniformes: Cobitidae) is a small cyprinid fish. In this study, the complete mitochondrial genome sequence of S. pulchra is sequenced. The S. pulchra complete mitochondrial genome (GenBank accession no. KT362179) was a circular molecule of 16 568 bp in length, with 13 protein-coding genes (PCGs), 2 ribosome RNA (rRNA) genes, 22 transfer RNA (tRNA) genes, an L-strand replication origin (OL) and a control region (D-loop). The nucleotide acid composition of the entire mitogenome was 31.69% for A, 25.63% for T, 26.94% for C and 15.74% for G, with an AT content of 57.32%. The AT content of 12S rRNA, 16S rRNA and D-loop was 50.21%, 56.86% and 66.74%, respectively.