The belly has a distinct "keel" of modified, saw-toothed scales called scutes.
It features a blue-green to gray back that abruptly transitions to silvery-white sides and a white belly. Some individuals exhibit a golden-green or blue reflection. alosa chrysocloris
It has a prominent, protruding lower jaw that extends beyond the upper jaw, and unlike some similar species, it possesses teeth on its tongue and both jaws. The belly has a distinct "keel" of modified,
Adults typically range from 10 to 17 inches (25–45 cm) but can reach a maximum length of approximately 22 inches (55–60 cm). They can weigh up to 1.7 kg (3.7 lbs). Distribution and Habitat Skipjack Herring (Alosa chrysochloris) - Species Profile and unlike some similar species
The Skipjack Herring is characterized by its slender, compressed, and "oblong" body shape.