What is "ngahue"

According to Maori mythology Ngahue (sometimes known as Ngake) was a contemporary of Kupe and one of the first Polynesian explorers to reach New Zealand. He was a native of the Hawaiki and voyaged to New Zealand in “ Tāwhirirangi”, his waka (canoe). No time has been fixed for these voyages, but according to legend he discovered pounamu (Greenstone) and Ngahue killed a Moa (large flightless bird - now extinct) Pounamu was sometimes called Te Ika-o-Ngāhue (Ngāhue’s fish). and they took several boulders back to Hawaiki.