What diagnostic feature frequently identifies the European Whiting (M. merlangus)?
A prominent black spot located immediately behind the eye
When identifying a fresh specimen of the European Whiting, *M. merlangus*, one of the most frequently cited and useful diagnostic features is a specific dark marking. This distinguishing mark is a prominent black spot situated immediately behind the eye area, often near the gill cover. This dark marking serves as a quick and useful visual confirmation for scientists and anglers when handling the fish. While features like the silvery-grey hue and general elongated profile are helpful, the presence of this specific dark spot is often the key detail used to confirm the species identification when dealing with true *Merlangius* members in the field. The absence of this spot, conversely, might point towards other related hakes or entirely different species.
