The bluefinned butterfish (Odax cyanoallix) a species of marine ray-finned fish, a weed whiting from the family Odacidae, which is found only around Three Kings Islands about 80 km north of New Zealand.

[2] It is found in shallow reef areas where brown seaweed is abundant.

[3] This species can reach a length of 27 centimetres (11 in) SL.

It is of minor importance to local commercial fisheries.

[2] Isolated individuals have been recorded elsewhere around the northern North Island.