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Lucania parva
Image courtesy of Richard A. Ingebrigtsen
Lucania parva
Taxonomic Group: Fishes


Rainwater Killifish (Lucania parva) is native to Atlantic Coast from Cape Cod, MA to the Florida Keys and Quintana Roo, Mexico. Its most commonly found in estuaries, not far above the tideline, however, it ranges far into non-tidal freshwaters is several rivers that have mineral-rich saline waters. This species was introduced to the west coast between 1958 and 1963. It’s likely that these fish were accidentally with fish stocked by a hatchery in Dexter, New Mexico. Introductions occurred in the San Francisco Estuary and Irvine Lake, California, Yaquina Bay, Oregon, and Blue Lake, Utah Lake, and Timpie Springs in Utah, and a few others. The introduction of Rainwater Killifish may have played a role in the extirpation of the endangered Tidewater Gobies (Eucyclogobius newberryi) in the San Francisco estuary.

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Fofonoff PW, Ruiz GM, Steves B, Simkanin C, & Carlton JT (2018)
National Exotic Marine and Estuarine Species Information System.
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Marine Invasions Lab
Smithsonian Environmental Research Center

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