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The Clear Lake Splittail

Clear Lake Splittail was a lake-dwelling minnow native to Clear Lake and its tributaries in California. Its profile is historical: the species is considered extinct, and surviving splittails elsewhere should not be assumed to belong to it.

Identification

The mouth opened at the front of the head and had either tiny barbels or none. Its tail was less unevenly forked than that of the Sacramento Splittail. Technical accounts also distinguish scale and gill-raker counts, which are useful when examining preserved specimens.

Life in Clear Lake

Young fish used shoreline areas, while larger fish occupied open lake water. Historical accounts describe spawning in tributaries. This connected life cycle required both the lake habitat and access to streams rather than a single isolated stretch of shoreline.

A Historical Species

The name refers to a distinct fish from California’s Clear Lake, not to any splittail caught in a clear-water lake. Museum material and historical accounts provide the basis for its identification and size information. The maximum of 36 centimeters includes the tail and should be understood as a historical reference measurement.

Do Not Substitute Sacramento Splittail

The two names describe different species. A modern Sacramento Splittail observation does not demonstrate that Clear Lake Splittail has survived.

All Lakes With Clear Lake Splittail

Browse all lakes and reservoirs with confirmed Clear Lake Splittail records in our database, listed alphabetically.

No published lakes are currently linked to this species in our confirmed records.

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