What distinctive visual marker do all Arctic Char species possess on their fins that salmon lack?
Answer
Creamy white edging
The defining visual identifier for Arctic char is the presence of creamy white edging on their fins. This feature is explicitly stated as something salmon species lack, serving as a reliable marker even when both fish display bright colors during spawning runs. While both fish may have spots, the color and location of these spots are also key differentiators; char have light spots (often pink or white), whereas salmon typically possess dark spots if they have them at all. The white trim on the fins provides a conclusive identification cue.
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