The vendace individuals examined showed the following characteristics: D III 8-10; A III 9-14; V II 9-11; P 3-15; sp.br. 1 40-46; r. branch. 7; l.l. 72-81. The Leśne vendace differed from other populations described in the literature in having a higher dorsal fin (X19) only. A comparative analysis of the vendace caught in the Leśne in autumn and spring showed a number of differences in morphometric characters, the differences resulting mainly from the fact that those individuals caught in spring had their ventral parts filled with gonads.

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