In the floodplain area on the left bank of the Mosoni-Dunaube, between the Széchenyi István University in Győr and the Szúnyog-island, an area enclosed by two locks was created, forming the 4 km long backwater of the Mosoni-Danube.

The water area primarily provides entertainment for enthusiasts of sport fishing, often rewarding their perseverance with sizable catches.

Catchable fish species: carp, grass carp, pike, perch, catfish, bream, roach, bass