Complete mitochondrial genome of the Volk’s sculpin Cottus volki (Cottoidei: Cottidae)

The complete mitochondrial genome was sequenced in two individuals of the Volk’s sculpin Cottus volki. The genome sequences are 16,519 and 16,536 bp in size, and the gene arrangement, composition, and size are very similar to the other sculpin mitochondrial genomes published previously. The difference between the two genomes studied is relatively high, 3.42%, which is 30% of the average interspecific divergence (8.76%) detected between seven Cottus species from the GenBank database. The data are consistent with the sedentary lifestyle in C. volki, limiting gene flow even between neighbouring rivers.