Gerres cinereus
Bright silver; Yellow ventral fins; Pectoral fins may be yellowish;
may show several indistinct vertical bars; similar species: Slender Mojarra,
Bigeye Mojarra, Flagfin Mojarra; Silver Jenny;
I reduced picture size so they would be visible on your screen. Just click on thumbnail for 6 x 4 picture, and name for 10 x 8 full size picture or more info.
Size: 8-12 inches; max 16 inches;
Audubon Field Guide; page 504; plate 215;
Reef Fish ID 3rd ed; page 80-81; plate 81;