Phoxinus Karsticus (Phoxinus karsticus), first described by Bianco & De Bonis, 2015 is a small fish in the family Cyprinidae (order Cypriniformes). Adults typically reach 7.30 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Temperate waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Near Threatened.The species is kept in the aquarium hobby. Care requirements and behaviour align broadly with other Cyprinidae kept in the hobby.
Dorsal soft rays (total): 10 - 11; Anal soft rays: 10. Phoxinus karsticus is distinguished from other congeners from Italy and Western Balkans by having high number of scales in longitudinal series 81-86, and number of circumpeduncular scales, 40-42, size of about 91 mm of TL. The holotype has a longitudinal band discolored or reduced. The holotype, and paratypes have patches of breast scales well developed and united in their third front. Dorsal fin has three simple rays and 7-8 branched rays; 8 branched rays only seldom were found in all others sample here analyzed; the pharyngeal teeth formula from left bone is 5.2 or 4.2. One additional non-unique character useful to distinguish the species is the anterior origin of anal fin placed in advance of vertical through posterior insertion of dorsal fin, reaching the level of the fifth or sixth branched rays of the dorsal fin .: elongated.
Behavioural data for Phoxinus Karsticus is currently being reviewed.
Freshwater; benthopelagic. Temperate endemic to the Karstic Popovo Polje-Trebinje endorheic river system in Bosnia Herzegovina.
The following diseases are known to affect Phoxinus Karsticus.
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