Carapace surface somewhat uneven; front with two lobes; antero-lateral margin almost straight and cut into 2 teeth which are more prominent than those of H. nudus; there is an impressed H medially. Chelipeds smooth, stout and with long fingers irregularly toothed. Walking legs with setose margins.
SizeCarapace: male 36 x 49.5 mm, female 31 x 42 mm.
ColourGreat variation; patterns resemble pebbles, among which these animals are often found. Commonly carapace grey-green with dots and patches of light grey and brown with a narrow white, or light-coloured marginal band and white crescents posteriorly. White ventrally. Chelipeds white with green and brown areas; fingers light brown with green streaks. Walking legs cream and green with dark brown or purplish pigment spots forming indistinct bands; dactyl light with 5 rows of dark seta. Eyestalk cream and grey with small dark brown dots; cornea black with silver flecks.