The divergence time between Yap hadal snailfish (YHS) and Mariana hadal snailfish. Phylogenetic tree constructed using the coding sequences of 13 mitochondrial genes (atp6, atp8, co1, co2, co3, cytb, nd1, nd2, nd3, nd4, nd4l, nd5, nd6), in which the divergence time between YHS and MHS was 0.044 million years ago.