Juveniles have been found as far upstream as 12 km, e.g. in Ten Mile River, Mendocino County, and San Antonio Creek and the Santa Ynez River, Santa Barbara County, sometimes in sections of stream impounded by California Golden beavers (Castor canadensis subauratus) which provide ideal slow-moving water habitat for tidewater gobies.
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The genus name translates as "true cycloid goby", referring to the scales, while the species epithet is in honor of J. S. Newberry.
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Tidewater goby, Ghost shrimp and Mud shrimp, as well as significant seabird aggregations and other species depend upon this habitat.
Four special-status animal species - California red-legged frog (Rana draytonii), coho salmon, steelhead trout, and tidewater goby are the focus of a June, 2010 Watershed Management Plan.