The blue whiting, Micromesistius poutassou. Also (in full southern poutassou): the southern blue whiting, M. australis, of the Southern Ocean.
Origin
Mid 19th century; earliest use found in Jonathan Couch (1789–1870), physician and naturalist. From Occitan poutassou, variant of potasson pollack from potàs big lip + -on, diminutive suffix.