The brill (Scophthalmus rhombus) is a species of flatfish in the turbot family (Scophthalmidae) of the order Pleuronectiformes.

[2] Brill have slender bodies, brown covered with lighter and darker coloured flecks, excluding the tailfin; the underside of the fish is usually cream coloured or pinkish white.

Brill weigh up to 8 kg (18 lb) and can reach a length of 75 cm (2 ft 6 in), but are less than half that on average.

On the west coast of Canada (outside the range of Scophthalmus rhombus) local fisherman refer to the petrale sole, Eopsetta jordani, as brill.

The flesh is lighter in texture, more friable - even "floury" - and considerably less rich in flavour than the turbot, which is preferred by chefs.