Tide-water silverside - Inland silversides are quite elongate even for silverside, with lengths 6 to 7 times depth.
Key silverside - The key silverside is a U.
Waccamaw silverside - Known only from Lake Waccamaw and the upper Waccamaw River in Columbus County, North Carolina, the silverside is found in the upper Waccamaw River only during periods of high water and is not a permanent resident.