Definition of "weakfish"
weakfish
noun
plural weakfishes or weakfish
Any of several species of game fish, of the genus Cynoscion, found in North American waters.
Quotations
Larger fish tend to migrate farther north than smaller ones; thus, the New England weakfish fishery may possess a higher percentage of large individuals than is characteristic of the coastwide fishery. Weakfish tend to move about in schools of similar-sized individuals.
1991, Michael R. Ross, Recreational Fisheries of Coastal New England, page 194
The weakfish is referred to as a gray trout from Maryland south, mainly to separate it from the spotted seatrout (p. 36), which is found in the southern portion of the weakfish’s range. Weakfish (Cynoscion regalis) look very much like a freshwater trout, although they exhibit few characteristics of this species.
2001, “Inshore Salt Water Fishing: Learn from the Experts at Salt Water Magazine”, in Salt Water Sportsman, page 90