1. (noun) New Zealand brill, Colistium guntheri - a greenish-brown fish with fine dark mottling in longitudinal lines on upper surface. Body broadly oval with projecting hook-like snout and very small eyes. An endemic fish found south of Cook Strait to Otago inhabiting sand and mud seabed in inshore waters, harbours and estuaries to depths of 100 m. Sometimes written as two words, i.e. pātiki nui.