| Family | Scientific Name | Author | Year | Common Name |
| Cyprinidae | Cyprinus rubrofuscus | Lacepède | 1803 | Koi |
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).
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.
Goldfish, Carassius auratus. Lacks barbels. Usually 28-32 lateral line scales. Lacks dark edging on scales.
References
Daniel, W. M., C.R. Morningstar, and J. Procopio. 2021. Cyprinus rubrofuscus Lacepède, 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).
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