Which of the following is classified as a game fish?

Walleye is recognized as a game fish due to its popularity among anglers and its significant role in sport fishing. Game fish are typically sought after for recreational purposes and are known for providing a challenging catch due to their size and behavior. Walleye offers both a thrilling fishing experience and desirable eating qualities, making it a favorite among sport fishers.

In contrast, shad and goldfish do not qualify as game fish. Shad is often considered a bait fish and is not primarily pursued for sport fishing. Goldfish, commonly kept as pets, are not found in natural fishing environments and do not fit into the category of game fish. Trout is indeed another example of a game fish, widely enjoyed by anglers; however, the question specifically asked for a single choice identified as a game fish. In this context, walleye stands out as a primary representative of game fish within the options provided.