Occurrence of the Erythrean invader Pteragogus pelycus Randall, 1981 (Teleostei: Labridae) in the eastern Aegean sea

Summary The occurrence of the Erythrean fish Pteragogus pelycus, off Kusadasi Bay, Turkey, eastern Aegean Sea, is here reported for the first time. One specimen was collected and it is now maintained in aquarium. The finding shows that its population is expanding northwards, along the Anatolian coasts of the Aegean Sea, approaching the colonization of the whole south and central basin.