Definition of spotted trout in US English:

spotted trout

noun

US
  • Any of various trout-like North American fishes with spotted coloration, as the spotted sea trout, Cynoscion nebulosus (family Sciaenidae), of south-eastern coasts, and the black crappie, Pomoxis nigromaculatus (family Centrarchidae), of fresh water.

Origin

Late 19th century; earliest use found in George Goode (1851–1896).