Caprella scaura is thought to come from the western Indian Ocean and was first recorded in the Atlanto-Mediterranean region in the Lagoon of Venice in 1994. Since then the species has rapidly spread throughout the Mediterranean Sea and it has recently been reported in the eastern Atlantic Ocean. The occurrence of C. scaura in two marinas in Lanzarote, Canary Islands, is discussed taking into account the possible pathways of introduction. The most likely vector of introduction is within the hull-fouling community on recreational craft. It may be expected to appear in other marinas within Macaronesia.
