Common name: neon tetra
available through www.itis.gov
Identification: Weitzman and Fink (1983) revised the group, and provided distinguishing characteristics, a key, and photographs. Color photographs were provided by Géry (1977), Weitzman and Fink (1987), and Sakurai et al. (1993). Similar species include Paracheirodon simulans (green neon) and P. axelrodi (cardinal tetra).
Size: 4 cm.
Native Range: Tropical America. Upper Amazon basin of Peru, Colombia and Brazil.
Hydrologic Unit Codes (HUCs) Explained
Puerto Rico &
Interactive maps: Point Distribution Maps
Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Paracheirodon innesi are found here.
Table last updated 2/27/2023
† Populations may not be currently present.
Means of Introduction: The record is most likely the result of fish escapes from local fish farms that use the hot springs for culturing aquarium fish.
Status: Failed in Colorado.
Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.
References: (click for full references)
Géry, J. 1977. Characoids of the world. Tropical Fish Hobbyist Publications, Inc., Neptune City, NJ.
Weitzman, S. H., and W. L. Fink. 1987. Neon tetra relationships and phylogenetic systematics. Tropical Fish Hobbyist 1987(October):72-77.
Weitzman, S. H., and W. L. Fink. 1983. Relationships of the neon tetras, a group of South American freshwater fishes (Teleostei, Characidae) with comments on the phylogeny of New World characiforms. Bulletin of the Museum of Comparative Zoology 150(6):339-395.
Zuckerman, L. - Aquatic Ecologist, Kansas Department of Wildlife and Parks, Pratt, KS.
Zuckerman, L. D., and R. J. Behnke. 1986. Introduced fishes in the San Luis Valley, Colorado. Pages 435-452 in R. H. Stroud, editor. Fish culture in fisheries management. Proceedings of a symposium on the role of fish culture in fisheries management at Lake Ozark, MO, March 31-April 3, 1985. American Fisheries Society, Bethesda, MD.
Revision Date: 11/13/2003
Peer Review Date: 11/13/2003
Nico, L., 2023, Paracheirodon innesi (Myers, 1936): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=426, Revision Date: 11/13/2003, Peer Review Date: 11/13/2003, Access Date: 3/20/2023
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.