大头狗母鱼（学名：Trachinocephalus myops）为辐鳍鱼纲仙女鱼目合齿鱼亚目合齿鱼科大头狗母鱼属的鱼类，俗名公奎龙。

本鱼分布于太平洋、非洲、印度、印度尼西亚、玻里尼西亚、美拉尼西亚、菲律宾、朝鲜、日本、**以及南海、东海等海域。该物种的模式产地在圣赫勒拿岛。

Trachinocephalus myops is a marine fish. It is a member of the lizardfish family commonly known as the snakefish or painted grinner and is the sole member of its genus. This species grows to a length of 40 centimetres (16 in) TL. It has pale blue and yellow wavy stripes along its body, with a few darker bars on the sides and a dark spot along the gill opening. The snakefish is found worldwide in tropical and warm-temperate waters, with the exception of the northeastern Atlantic Ocean and the eastern Pacific Ocean.