Ameiurus nebulosus (Le Sueur, 1819)

Iftime, Alexandru & Oţel, Vasile, 2025, An annotated systematical checklist of the Romanian ichthyofauna, Zootaxa 5654 (1), pp. 1-64 : 18-19

Ameiurus nebulosus (Le Sueur, 1819)

A non-native freshwater species, introduced deliberately and spreading from introductions beyond the country, freely reproducing, self-sustaining populations and found in several catchments, both intra- and extra-Carpathian ( Iftime & Iftime 2021; Nagy et al. 2023; Drăgan et al. 2024).

ORD. SALMONIFORMES

Fam. Esocidae

Esox lucius Linnaeus, 1758

A native, widespread fresh- and brackish-water species living in stagnant or slow-flowing water, in plain or hill areas, in both intra- and extra-Carpathian drainages, in and along the Danube and its major tributaries, the Danube Delta and some littoral lakes/lagoons ( Bănărescu 1964; Oțel 2007; Cocan & MireȘan 2018; Năstase et al. 2022; Nagy et al. 2023; Năstase & Năvodaru 2023).

Fam. Umbridae

Umbra krameri Walbaum, 1792

A native, localized freshwater species, living in stagnant or slow-flowing water, in plain or low hill areas, it was found in both intra- and extra-Carpathian areas: various areas of the Danube Delta and the Razim lagoon system (Tulcea county), the Eced marshes (now extinct here), ponds at Urziceni (old records) and the Homorodu Vechi river (Satu- Mare county), Ier River and its backwaters at Săcuieni, Cherechiu, Cadea, Ciocaia, Simian and Resighea, Ieru Morii and Rât creeks, creeks at CurtuiȘeni and ScăriȘoara Nouă (Bihor county—with severe range reduction in the area), TimiȘul Mort at Obad (TimiȘ county), ponds at Izvoarele, Plosca and Cătane (Mehedinți county—old records), the Jieț River and its canals/backwaters at CăciulăteȘti, Sadova, Ostroveni, RojiȘte/TâmbureȘti (Dolj county), ȚigăneȘti and Cerveni (Teleorman county—old records), ponds at Crânguri (old records), Comana pond and Gurbanu creek (Giurgiu county), Tânganu creek, Colentina river and its ponds/lakes near Bucharest (Ilfov county—old records), ponds at Vasilați, GălbinaȘi and Frăsinet (CălăraȘi county—old records), CristeȘti pond near IaȘi (now extirpated) and possibly near PaȘcani (uncertain data) and in the Teiva pond, where reintroduced from the Republic of Moldova where it still occurs in backwaters of the Prut (IaȘi county) ( Bănărescu 1964; Bănărescu et al. 1995; Wilhelm 1998; Wilhelm et al. 2002; Bănărescu 2005; Oțel 2007; Davideanu 2008; Telcean et al. 2014; Covaciu-Marcov et al. 2018; Cocan & MireȘan 2018; Năstase et al. 2022; Lațiu et al. 2023; Nagy et al. 2023; Năstase & Năvodaru 2023). An environmental DNA study claimed detection of this species’ presence in the lower Danube and the lower ArgeȘ in Romania ( Pont et al. 2021).

Fam. Coregonidae

Coregonus ladogae Pravdin, Golubev et Belyaeva, 1938

A non-native freshwater species, deliberately introduced and grown in aquaculture, also introduced in a few montane lakes and reservoirs (Lake RoȘu, the Bicaz reservoir and a dam lake in Harghita county, Eastern Carpathians; Vidraru and Vidra reservoirs, Southern Carpathians ; Făerag Lake , Western Carpathians ); it is unclear whether it survives to this day ( Iftime & Iftime 2021, and sources quoted therein) .