I-Family Macrouridae iwuhlelo lwe-taxonomic olusetshenziswa kusayensi yezilwane ukuchaza umndeni wezinhlanzi zasolwandle olwaziwa kakhulu ngokuthi ama-grenadier noma ama-rattails. Lezi zinhlanzi zivame ukutholakala e-Atlantic, Pacific, nase-Indian Oceans, nakwezinye izingxenye ze-Southern Ocean. Igama elithi "macro" lisho "inkulu" futhi "uridae" libhekisela emndenini wezinhlanzi, ngakho i-Macrouridae ingahunyushwa ngokukhululekile ukuze isho "umndeni wezinhlanzi ezinkulu."