Found in water courses at high altitudes and on the lowland rivers, with little current . Also occurs in clear streams and springs. Enters subterranean waters during winter or droughts. Omnivorous. Threatened due to water abstraction, pollution and introduction of Salmo trutta. Considered on the very edge of extinction, with a single small population known .
Diagnosed from its congeners by having the following characters: conspicuous black midlateral stripe in preserved individuals; 67-79 (usually 68-75) scales along lateral line; anal fin with 8½ branched rays; 6-7 gill rakers; and caudal peduncle depth 2.1-2.7 times in its length .: elongated.
Behavioural data for Telestes Polylepis is currently being reviewed.
Freshwater; benthopelagic. Temperate; 46°N - 43°N, 15°E - 19°E known only from Croatia in Stajnicka Jaruga.
The following diseases are known to affect Telestes Polylepis.
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