Ko ngā roera ara poroporo momo porotiti he rite-ki-te-uru, he poroporo rarangi kotahi, takirua rānei, e hangai ana ki ngā poroporo whakapā awaawa hohonu, koki rānei. He mowhiti o waho matotoru ō rātou pakitara me te mata o waho karaunatia (e wātea ana hoki me te mata o waho porotaka mena ka tonoa). Ko te roera ara momo porotaka me te kara rerekē, kāore rānei, he wae katoa kei roto ko te porotaka mīhini, te horoi pana, he mowhiti o waho me te huihuinga roera ngira me te whare herehere, he huinga roera ngira, porotaka rānei e tino tāpirihia ana.
