Common name: unidentified poeciliid (hybrid)
available through www.itis.gov
Identification: According to Mundy (2005), the shortfin mollies introduced in the Hawaiian islands around 1960 are hybrids whose parental species will never be known with certainty, but that are in the Poecilia sphenops complex (called the Poecilia salvatoris/mexicana species complex in Yamamoto and Tagawa 2000). They have been previously identified as P. mexicana, P. salvatoris and P. sphenops (Maciolek 1984; Devick 1991; Yamamoto and Tagawa 2000). Englund et al. (2000) stated that the morphological characters of these shortfin mollies in the Hawaiian Islands are not congruent with any described species but that they are distinctive and apparently do not interbreed with other poeciliids in Hawaii.
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 Poecilia sp. are found here.
Table last updated 6/28/2019
† Populations may not be currently present.
Means of Introduction: Aquarium release.
Status: Established in Hawaii.
References: (click for full references)
Devick, W.S. 1991b. Pattern of introductions of aquatic organisms to Hawaii freshwater habitats. Pages 189-213 in: New directions in research, management and conservations of Hawaiian freshwater stream ecosystems. Proceedings of 1990 symposium on freshwater stream biology and fisheries management, Hawaii Department of Land and Natural Resources, Division of Aquatic Resources, Honolulu, HI.
Englund, R. A., D. J. Preston, R. Wolff, S. L. Coles, L. G. Eldredge and K. Arakaki. 2000. Biodiversity of freshwater and estuarine communities in lower Pearl Harbor, Oahu, Hawaii with observations on introduced species. Final Report prepared for the U.S. Navy. Bishop Museum Technical Report 16: 1-167.
Maciolek, J. A. 1984. Exotic Fishes in Hawaii and Other Islands of Oceania. Pages 131-161 in: W.R. Courtaney, Jr. and J.R. Stauffer, Jr. (eds). Distribution, Biology, and Management of Exotic Fishes.
Mundy, B. C. 2005. Fishes of the Hawaiian Archipelago. Bishop Museum Bulletins in Zoology, Number 6.
Yamamoto, M. N. and A. W. Tagawa. 2000. Hawaii's Native and Exotic Freshwater Animals. Mutual Publishing, Honolulu, HI. 200 pp.
Revision Date: 5/9/2019
Peer Review Date: 4/1/2016
Schofield, P.J., 2019, Poecilia sp. Bloch and Schneider, 1801: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=855, Revision Date: 5/9/2019, Peer Review Date: 4/1/2016, Access Date: 8/24/2019
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.