Both, like the majority of herrings, are greenish on the back and silvery on the sides, but they are distinguished from the other European species Clupea by the presence of a large blackish blotch behind the gill-opening, which is succeeded by a series of several other similar spots along the middle
Elwesii, a native of the Levant, with large flowers, the three inner segments of which have a much larger and more conspicuous green blotch than the commoner kinds.
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