What physical feature often distinguishes a walleye from its cousin, the sauger?
Answer
A single, prominent white spot on the tip of the lower lobe of their tail fin.
Although the walleye and the sauger (*Sander canadensis*) share similarities as members of the Percidae family, anglers often use the tail fin marking to differentiate them. The walleye typically displays a distinctive feature: a single, prominent white spot located specifically on the tip of the lower lobe of its caudal (tail) fin. This specific marking is frequently absent on the sauger. Other physical differences exist, such as walleye generally being larger, but this tail spot is a key visual identifier mentioned for quick separation between the two closely related species.
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