Notchheaded marblefish

The notchheaded marblefish has an elongate body which has a depth equivalent to roughly a quarter of its standard length. The largest individuals have a bony ridge above the eye, with the space between the eyes being concave. It has a short snout and a rounded head which has a small mouth which is slightly downturned and has fleshy lips, the upper lip projecting. The jaws have small, mostly multicuspid teeth with a few tricuspid ones too and they are set on 3-4 rows in the jaws. The outermost row has the largest teeth and there are two patches of vomerine teeth. There are two pairs of nostrils, the front pair have fleshy flap with cirri on the front and rear margins. There is a wide, flattened spine embedded in the operculum which does not reach the margin. The dorsal fin has a long base but it is nearly split in two by a deep and wide incision between the spiny and soft rayed parts. The profile of the head shows a notch to the rear of the eye. The dorsal fin contains 15-17 spines and 19-20 soft rays while the anal fin has 3 spines and 6-7 soft rays. It has large pectoral fins which may be longer than the head and the lowest 5-6 rays are unbranched and fleshy. The body is covered in small, cycloid scales which are embedded in the skin, these extend on to the cheeks and operculum and create a sheath along base of the spiny portion of the dorsal fin. …

The notchheaded marblefish is found only around islands in the Tasman Sea in the southwestern Pacific Ocean. In Australian waters it is found off Lord Howe Island and Norfolk Island while in New Zealand it occurs at the Kermadec Islands and the northern coast of New Zealand's North Island. It is found on coastal reefs at depths between 6 and 20 m (20 and 66 ft).