• adipose fin present
• the length at the base of the anal fin is greater than the length at the base of the dorsal fin (anal fin on an angle, slanted back)
• parr marks are small and oval shaped
• parr marks are dark coloured over lighter coloured side of fish (dark on light background)
• the height of the parr marks is less than the vertical diameter of the eye
• parr marks regular in shape and positioned regularly on the fish (they may be faint or absent below the lateral line)
• width of, or space between each parr mark, is greater than the width of the parr marks themselves
  

Known distribution: Yukon River System, Mackenzie and Mackenzie River systems (upper Liard).

Other notable comments and clues:

• Chum salmon hatch and head almost directly to the ocean, so it would be rare to find one over approx 50-55mm in length at any time in the Yukon.
• Very silvery in colour and parr marks can be quite faint.