in taxon grenadier ridge scaled rattail The ridge scaled rattail, *Macrourus carinatus*, is a rattail of the genus *Macrourus*, found in the Great Southern Ocean at depths of between 200 and 1,200 m. Its length is between 30 to 65 cm, although Fishbase records lengths up to 1 m. macrourus carinatus Macrourus carinatus requires discussion