Grammatorcynus bilineatus (Rüppell 1836) —Double-lined mackerel (Fig. 151) Status at New Ireland. First recorded from Kulineua River, New Hanover by Munro (1958: 262–263); reported from St. Mathias Group and Kavieng, New Ireland by Collette & Gillis (1992: 45). Specimens photographed in Kavieng region on 1 June 2013 during ACIAR Aquarium Survey; specimens observed by at Kavieng fish market by Barry C. Russell on 7 and 28 June 2014. Specimens photographed at Lissenung Island by Dietmar Amon on 6 Apr. 2008; others photographed at St. KVG24 (off northwestern Bauddisson Island) by Serge Andréfouët on 22 Aug. 2014. Distribution and habitat. New Ireland: 1, 2, 4.—General distribution: Red Sea east to Marshall Islands and Fiji, north to Ryukyu Islands, south to northern Australia and New Caledonia. Pelagic, near coral reefs, 15–50 m depth. Marine.

Published as part of Andréfouët, Serge, Chen, Wei-Jen, Kinch, Jeff, Mana, Ralph, Russell, Barry C., Tully, Dean & White, William T., 2019, Checklist of the marine and estuarine fishes of New Ireland Province, Papua New Guinea, western Pacific Ocean, with 810 new records, pp. 1-360 in Zootaxa 4588 (1) on page 310, DOI: 10.11646/zootaxa.4588.1.1, http://zenodo.org/record/2988163