| Name and Description | |
| Island Silverside Menidia beryllina |
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| Sacramento Sucker Catostomus occidentalis A common bottom feeder found in Alameda Creek in Sunol park. |
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| Green Sunfish Lepomis cyanellus |
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| Bluegill Lepomis macrochirus |
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| Smallmouth Bass Micropterus dolomieu |
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| Largemouth Bass Micropterus salmoides |
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| Prickly Sculpin Cottus asper |
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| Hitch Lavina exilicanda This type of fish is grey steel blue on top and dull silver on the bottom. Generally found in small warm intermittent streams. May be found in isolated pools in large numbers due to their tolerance of relatively high temperatures and low oxygen levels. Will hybridize with California Roach. |
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| California Roach Lavina symmetricus This type of fish is grey steel blue on top and dull silver on the bottom. Generally found in small warm intermittent streams. May be found in isolated pools in large numbers due to their tolerance of relatively high temperatures and low oxygen levels. Will hybridize with the Hitch. |
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| Golden Shiner Notemigonus crysoleucas |
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| Sacramento Blackfish Orthodon microlepdotus |
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| Sacramento pike-minnow Ptychocheilus grandis A large predatory fish formerly known as the squawfish. |
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| Rainwater Killifish Lucania parva |
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| Three-spine Stickleback Gasterosteus aculeatus |
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| Bigscale Logperch Percina macrolepita |
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| Western Mosquito fish Gambusia affinis |
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| Rainbow Trout/ Steelhead Trout Oncorhynchus mykiss |
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| Pacific Lamprey Lampetra tridentata |
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| Sacramento Perch Archoplites interruptus |
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| Tule Perch Hysterocarpus traski |