Franco Banfi / Blue jack mackerel, (Trachurus picturatus) baitball, Formigas Islet dive site, Azores, Portugal, Atlantic Ocean

Pascal Kobeh / Yellowtail surgeonfish (Prionurus punctatus) grazing algae with a school of jack mackerels (Trachurus symmetricus) Baja California peninsula, Mexico. Sea of Cortez.

Doug Perrine / Bait ball of Blue jack mackerel / Scad {Trachurus picturatus} Azores, N Atlantic