The bigmouth skate (Amblyraja robertsi) is a species of fish in the family Rajidae.

It lives near the bottom in deep waters in Southeast Atlantic in depths below 1,000 m (3,280 ft).

Its maximum size is 77 cm (30 in).

It has a hard, roughly triangular snout and smooth body with star-based thorns around its eyes, tail, and elsewhere.

Its top side is dark gray and underside has white spots.