The broadmouth catshark (Apristurus macrostomus) is a rare catshark of the family Scyliorhinidae, the holotype and only specimen of which was taken from off Zhujiang in the South China Sea, at a depth of 913 m. Its length is around 38 cm. The broadmouth catshark's reproduction is oviparous. Considering the species is not well known, the threats are not known either but may be deepwater fisheries.