|Armoured flathead, Hoplichthys haswelli
Drawing by Dr Tony Ayling
They are elongated fishes with very broad and strongly depressed heads, bearing spines and ridges. They are scaleless. Their lateral lines contain spiny scutes. Their pectoral fins have three or four lower rays free. Their pelvic fins are widely set apart. They are benthic from about 10 to 1500 m, with a maximum length of 43 cm.