Maurex or Maurikas (Greek: Μαύρηξ/Μαυρίκας) was a Byzantine naval commander active in the latter half of the 11th century, chiefly in the Byzantine–Norman Wars. His identity is not certain, as several different people are habitually identified as the same person: a "Maurex" who was a wealthy sailor and magnate from Heraclea Pontica, an admiral called in Latin sources Mambrita or Mambrica who was active against the Normans in the 1060s and 1080s, and Michael Maurex, a general and governor known through his seals.