Solea solea is a strongly compressed flatfish with eyes and snout on the right hand side. It is oval in shape with a rounded head and can grow up to 70 cm in length but is more commonly between 30-40 cm. Depending on the substratum the colour of the sole can vary between grey, reddish brown and grey-brown with dark blotches. The sole has two well developed pectoral fins, and the dorsal and anal fins connect to the base of the tail. The anal and dorsal fins have a narrow white margin and the upper pectoral fin has a distinct dark spot at the free end. There is also a series of fine stubble-like filaments around the head.The sole is similar to the solenette (Buglossidium luteum) however the solenette is much smaller, growing to a maximum of 13 cm, and has a less developed upper pectoral fin. Solea solea is also known as common or Dover sole and is an important food fish.

The sole is included in the UK Biodiversity Action Plan for commercial marine fish. It is, however, vulnerable to over exploitation and populations may be declining.