A freshwater fish, Coregonus pollan, resembling a herring
A lake whitefish (Coregonus pollan), local of Ireland. In features it resembles a herring.
The alleged fresh-water herring of Ireland, many different whitefish theoretically known as Coregonus pollan, found in the numerous loughs. The corresponding variety of the Scotch lochs is named powan and vendace. See Coregonus and whitefish.