Acipenser nudiventris Lovetzky, 1828

Iftime, Alexandru & Oţel, Vasile, 2025, An annotated systematical checklist of the Romanian ichthyofauna, Zootaxa 5654 (1), pp. 1-64 : 6

Acipenser nudiventris Lovetzky, 1828

A native species; Danube catchment populations restricted to freshwater. Formerly found in the Danube and lower course of some of the main tributaries, occasionally reaching the brackish marine waters at the Danube mouths ( Bănărescu 1964; Oțel 2007). Last Romanian commercial capture was in 1956 (Oțel 2007). Nowadays most likely extirpated in the area (Oțel 2007; Jarić et al. 2009; Strat & Gheorghe 2023); see Oțel 2007 for timeline of Romanian catches. Occasional records (latest, 2019) in the middle Danube and its tributaries might indicate the persistence of a population ( Nyeste et al. 2020) which could extend to the Romanian Danube above the Iron Gates. Recently available for aquaculture in the Danube basin in Austria (AquaTech 2025; stock origin unspecified, possibly Russia —see Mikodina & Novosadova 2015).