I'm guessing a sardine or anchovy. Caught two of them. Both about 5 inches. Bluish/Silver in color. With a white lateral line from head to tail. Using them as live bait!
pilchards are same as sardines. Mouth is different from sardine to anchovy. To me, sardines have a more shad/tarpon like mouth vs anchovies have the filter feeder style head of an extremely large mouth and blunted nose.
Back when Newport Bay was loaded with Striped Bass. Every Deepbody Anchovy we caught resulted in a Striper. They would pester a regular Anchovy and follow it around and occasionally eat one, but the Deepbodys were lethal !