Cynomacrurus piriei, the dogtooth grenadier, is a species of rattail that occurs in the southern oceans, mostly south of the Antarctic Convergence.

This species grows to a length of 50 centimetres (20 in) TL.

[2] In 1909, Louis Dollo paper describing this species and circumscribing its monospecific genus Cynomacrurus was published.

The species's type locality is in the Weddell Sea at 71°50′S 23°30′W / 71.833°S 23.500°W / -71.833; -23.500.

The specific epithet was named in honor of Harvey Pirie, who was the surgeon, geologist, and bacteriologist aboard the Scotia.