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Rainwater killifish

species of fish

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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJul 6, 2026
Entity authorityQ3455573
Source-derived summary

The rainwater killifish (Lucania parva) is a small silvery fish with yellow flashes and diamond shaped scales that is widespread from Cape Cod, Massachusetts, through to Tampico, Mexico, with occurrences reported on the Yucatán peninsula. It is commonly found in large numbers in fresh to brackish estuarine environments, and inland in parts of New Mexico, Texas and Mexico. It feeds on various aquatic invertebrates. It can reach up to 7 centimetres (2.8 in) total length.

Species description and etymology

The rainwater killifish was formally described by Spencer Fullerton Baird and Charles Frédéric Girard as Cyprinodon parvus with the type locality given as Beesley's Point, New Jersey and as Greenport, Long Island, New York. The name of the genus, Lucania, is a Native American word from an unknown language and of unknown meaning which presumably Girard liked the sound of. Girard named this species as the type species of the genus Lucania in 1859 but using the junior synonym Limia venusta. The specific name is Latin for "small".

See also

Killifish (general)

References

Further reading

Hubbs, C.; Edwards, R.J.; Garrett, G.P. (July 2008). "An annotated checklist of the freshwater fishes of Texas, with keys to identification of species" (PDF) (Second ed.).

Editorial summary

Begin with the source’s own compact description: “Rainwater killifish” is species of fish. The dossier treats that line as a proposition to test through Rainwater, killifish and species, not as a finished interpretation.

Editorial reviewUseful for establishing the present vocabulary of the subject while preserving a route back to the evidence on which that vocabulary rests. The current lead gives the account dated anchors—1859, 2008—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Rainwater, killifish and species is the immediate research focus.
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Why this record matters

The phrase “species of fish” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Jul 6, 2026. The linked authority identifier is Q3455573. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1859 and 2008.

Critical limits

Scientific names, classifications and consensus can change while older terminology persists in catalogues and historical literature. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Source & attribution

This entry incorporates text from Rainwater killifish” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.