“…Corbicula cf. fluminea, which was first found in the Don River in 2017 (Zhivoglyadova et al, 2018), is considered one of the most aggressive invasive species tending to lead to negative environmental consequences (Bespalaya et al, 2018;Crespo et al, 2015) and is therefore likely to be a hazardous exotic species for PC mollusks in the freshwater and oligohaline zones. Recently, the brackish water mussel M. leucophaeta was reported from the inner Taganrog Bay (Zhulidov et al, 2015), which, if capable to survive low winter temperatures, can disrupt PC habitats, as has been reported in the Dniester Liman.…”