Iberian long-snout barbel

The Iberian barbel (Luciobarbus comizo) is a ray-finned fish species in the family Cyprinidae. It is here placed in Luciobarbus following the IUCN, but that genus is very closely related to the other typical barbels and perhaps better considered a mere subgenus of Barbus. This large barbel can grow to over 50 cm (20 in) long.

Natural hybrids of this barbel and the closely related L. bocagei are not uncommon in the middle Tagus river. The two species and their hybrids are hard to distinguish, but L. comizo usually has a longer and more narrow snout, and the last unbranched ray of the dorsal fin has a longer denticulated section but with more widely spaced denticles. In the first two traits the hybrids are intermediate between their parent species, in the latter they are closer to the Iberian Barbel. Also, the two species are distinguished by their microhabitat preferences where they are sympatric, with L. bocagei inhabiting somewhat faster-moving parts of the river. The hybridisation confounds phylogenetic studies based only on mtDNA.