Inhabits flowing water with gravel to stone bottoms, usually in riffles and rapids. Spawns in June .
Distinguished from its congeners in Europe by the possession of the following combination of characters: caudal fin forked; caudal peduncle depth 1.9-2.3 times in its length; eye diameter 21-26% HL; adult males with suborbital flap; lateral line reaching caudal base; dorsal fin with 8½ branched rays; and processus dentiformis present .: elongated.
Behavioural data for Bulgarian stone loach is currently being reviewed.
Freshwater; demersal. Temperate
The following diseases are known to affect Bulgarian stone loach.
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