ABSTRACT. – The parasitic copepods Chondracanthus horridus Heller, 1865 and Chondracanthus zei Delaroche, 1811 (Cyclopoida; Chondracanthidae) are recorded for the first time in Turkey. Chondracanthus horridus was found on the gill rakers of the black goby, Gobius niger L. and Chondracanthus zei on the gill rakers of the John Dory, Zeus faber L. captured during a trawl survey of demersal fish stock assessment in the Sea of Marmara. The morphological characters of female and dwarf males of copepods were assessed from microphotographs and drawings. This study presents new knowledge about the geographical distribution of these parasites.