Only amateur fishing with permits of the Ministry of Environment of the Republic of Lithuania is allowed in Žemaitija National Park. The lakes of Plateliai, Beržoras, Žiedelis, Ilgis, the pond of Rotinėnai are the most abounding with fish. The following types of fish prevail: redeye, roach, pike, perch, vendace. After ichtiological reasearch of the lakes, it was stated that 14 types of fish breed in the lake of Plateliai: pike, burbot, bream, roach, tench, bleak, perch, redeye, eel, vendace, Plateliai lavaret, crucian carp and ruff, in the lake of Ilgis – 11 types of fish: pike, bream, roach, tench, bleak, perch, redeye, eel, carp and ruff. The following types of fish prevail in the lake of Beržotas: perch, roach, bream, pike, redeye, bleak. In the pond of Rotinėnai there are bleaks, tenches, breams, etc.
