Cyprinus rubrofuscus

Cyprinus rubrofuscus
Koi – Cyprinus rubrofuscus
FamilyScientific NameAuthorYearCommon Name
CyprinidaeCyprinus rubrofuscusLacep├Ęde1803Koi

Cyprinus rubrofuscus

Unique Characters: Similar to Common Carp, Cyprinus carpio, having a large and serrated spine-like ray at front of dorsal and anal fins and two barbels on either side of upper jaw. Differing from Common Carp by having lateral line scales 29-33 + 2 or 3; 18-22.5 branched dorsal rays; and silvery body with red pelvic, anal, and lower caudal lobes (wild populations).

Cyprinus carpio Barbels
Cyprinus carpio Barbels

Similar Species:

Common Carp, Cyprinus carpio. Lateral line scales 33-37 + 2 or 3. 17-20.5 branched dorsal rays. Grey to bronze body. Each scale is dark edged with a black spot at the base.

Cyprinus carpio
Common Carp – Cyprinus carpio

Goldfish, Carassius auratus. Lacks barbels. Usually 28-32 lateral line scales. Lacks dark edging on scales.

Carassius auratus
Goldfish – Carassius auratus, wild color
Carassius auratus
Goldfish – Carassius auratus, pet shop specimen

References

Daniel, W. M., C.R. Morningstar, and J. Procopio. 2021. Cyprinus rubrofuscus Lacep├Ęde, 1803. U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=3294, accessed 09/26/2021).

United States Fish & Wildlife Service (USF&WS). 2020. Koi (Cyprinus rubrofuscus). Ecological Risk Screening Summary. (https://www.fws.gov/fisheries/ans/erss/uncertainrisk/ERSS-Cyprinus-rubrofuscus-FINAL-Jan2020.pdf; accessed 09/26/2021).

Gallery