This study deals with the alien mollusc species recorded along the Turkish coast after the last checklist published in 2014. Six species (Lodderia novemcarinata, Eratoena sulcifera, Zafra obesula, Z. pumilla, Retusa desgenetti, and Martesia striata) were added to the alien mollusc fauna of the Levantine coast of Turkey, two species (Leucotina natalensis and Pyrunculus fourierii) were recorded along the Aegean coast of Turkey and one species (Arcuatula senhousia) was found in the Sea of Marmara. The present study is also the first report of Varicopezapauxilla (Gastropoda: Cerithiidae) from the Mediterranean Sea. This gastropod species, which originates from the Indo-West Pacific Ocean, was found in Iskenderun Bay (Levantine coast of Turkey). With the above-mentioned species, the total number of alien molluscs along the Turkish coast amounts to 125 species.