A short-lived species. Adults occur in highland and lowland water courses with little current, in springs and associated wetlands and in lakes , with sand or silt bottom . Oviparous, with distinct pairing during breeding .
Presence of a black spot at caudal base, very small or sometimes absent, rarely two small spots. Pigmentation (Gambetta's longitudinal zone of pigmentation): zone Z4 with 12-21 roundish or squarish blotches, sometimes indistinct or fused two by two; flank not pigmented below zone Z4. Two laminae circularis.: elongated.
Behavioural data for Bulgarian spined loach is currently being reviewed.
During courtship, 'the male follows the female and, after both enter dense vegetation (e.g. filamentous algae), the male forms a complete ring around the female's body behind the dorsal as the female releases the eggs' .
Freshwater; brackish; benthopelagic. Subtropical occurs together with hybridogenous, sprem-parasitic lineages, which have originated by hybridisation of C.
The following diseases are known to affect Bulgarian spined loach.
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