Diversity of fishes along the coast of Türkiye

The Turkish marine fish diversity was revised and updated in this study based on data published in the last decade. There arecurrently 552 species in the inventory, reflecting an increase of 7.8% since the previous checklist and belonging to the classes of Teleostei(479 spp.), Elasmobranchii (68 spp.), Chondrostei (3 spp.), Petromyzonti (1 sp.), and Holocephali (1 sp.). Twelve species were excludedfrom the faunal list due to the lack of valid proof of their presence, the distribution ranges of an additional 12 species were corrected, twonew records (Istiompax indica (Cuvier, 1832) and Mola alexandrini (Ranzani, 1839)) previously unknown from Türkiye were presentedfor the first time, and a range expansion report for Parophidion vassali (Risso, 1810) was given. In terms of number of species, theLevantine Sea coast of Türkiye had the highest diversity with 477 species, followed by the Aegean Sea (466 spp.), Sea of Marmara (277spp.), and Black Sea (162 spp.). Alien fishes reported from the region have now reached 90 species, corresponding to 16.3% of the totalichthyofauna, the majority of which occur along the Levantine coast with significantly decreasing numbers in the clockwise directiontowards the Black Sea.