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The Sacramento pikeminnow (Ptychocheilus grandis), formerly known as the Sacramento squawfish, is a large cyprinid fish of California, United States.It is native to the Los Angeles River, Sacramento-San Joaquin, Pajaro-Salinas, Russian River, Clear Lake and upper Pit River river basins.
The Novato Creek watershed is known to support 10 extant fish species (6 native and 4 introduced). Native species include California roach, Sacramento pikeminnow, Sacramento sucker, steelhead, threespine stickleback, and Prickly sculpin. Introduced species include rainwater killifish, western mosquitofish, striped bass, and green sunfish. [4]
The Colorado pikeminnow, P. lucius, is the largest member of the genus, ranging from 4–9 lb (2–4 kg) in adult fish with occasional specimens up to 25 lb (11 kg). Historical and anecdotal reports of Colorado pikeminnows nearing 6 feet (1.8 m) in length and 80 lb (36 kg) in weight have been made.
Sacramento–San Joaquin is a freshwater ecoregion in California. It includes the Sacramento and San Joaquin river systems of California's Central Valley , which converge in the inland Sacramento–San Joaquin Delta .
The non-native Sacramento pikeminnow is present; it competes with and preys on young salmonids. [16] [55] The Eel River has never contained true eels, but is named for the Pacific lamprey, an eel-shaped parasite that attaches itself to other fish during its ocean life-cycle.
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Four species of anadromous salmonids, the coho salmon, chinook salmon, rainbow trout and coastal cutthroat trout are known from the estuary of the Salt River as are about two dozen estuarine fish including herring, sardine, smelt, stickleback, perch, sculpin, sole and flounder, and the freshwater invasive Sacramento pikeminnow. [6]: 37
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