The spotted seatrout or speckled weakfish (Cynoscion nebulosus) is a common estuary fish found in the southern United States. While most of these fish are caught on shallow, grassy flats, spotted seatrout reside in virtually any inshore waters, from the surf of outside islands to far up coastal rivers, where they often come for shelter during cold weather. Contrary to its name, the spotted seatrout is not a member of the trout family (Salmonidae), but of the drum family (Sciaenidae).

These fish have large, prominent canine teeth; dark back with grey or silvery sides marked with scattered ocellated black spots of varying size. Plain black spots are also present on the dorsal and tail fins. Its shape and coloration is reminiscent of a brown trout (Salmo trutta), hence the name. In stained water, this fish's background may take on a golden hue.

The spotted seatrout makes for excellent tablefare with a firm, white meat.
This fish is more commonly referred to as "speckled trout" by coastal fisherman along the Gulf of Mexico. Residents of Florida and coastal Georgia commonly refer to it as simply "trout." The shorter alias, "specks," is also used.

This fish is closely related to the weakfish, Cynoscion regalis.