Sea Lemon

Doris pseudoargus can reach 120 mm in length. It is oval and firm. The mantle is variously mottled and blotched with yellow, green, brown, and red and coarsely tuberculate. Its rhinophores are short and conical.

This species was described from Le Havre, Seine-Maritime, France. A neotype was designated in 2002 based on a specimen from Locmariaquer, Atlantic coast of France. It has been reported from Norway south to the Mediterranean Sea. It can be found on the lower shore, and offshore to 300 m.