Akademik Veri Yönetim Sistemi
Journal of Shellfish Research , cilt.45, sa.1, ss.191-199, 2026 (Hakemli Dergi)
Freshwater crayfish are among the most ecologically and environmentally impactful invasive organisms in inland waters, with the global ornamental aquarium trade recognized as one of the current major introduction pathways. In Türkiye, several nonnative crayfish species have previously been reported from the aquarium trade, but systematic monitoring of online marketplaces remains limited. In this study, the authors surveyed internet-based aquarium trade platforms to document invasive freshwater crayfish species offered for sale as ornamentals in Türkiye and to detect taxa newly recorded there. The results confirmed the online trade of four invasive or potentially invasive crayfish species; Procambarus clarkii, Cherax quadricarinatus, Cambarellus patzcuarensis, and Cambarellus diminutus. Notably, C. diminutus is recorded for the very first time in Türkiye. Although no established wild populations of these species are currently known, their continued availability through online trade substantially increases the risk of intentional or accidental release into natural freshwater ecosystems. Given the vulnerability of Turkish native crayfish fauna and regional hydrological connectivity, early detection through trade monitoring represents a critical tool for invasion prevention and management. The presented findings highlighted the urgent need for strengthened regulation, improved surveillance of online markets, improvement of related legislative framework, and increased public awareness to reduce the risk of future crayfish invasions in Turkish inland waters.