Jordi Chias / Atlantic spotted dolphins (Stenella frontalis) chasing fish (Trachurus trachurus) Santa Maria Island, 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.

Pascal Kobeh / School of Mackerel scads (Decapterus macarellus) swimming over a reef with Maldives anemonefish (Amphiprion nigripes) in Magnificent sea anemones (Heteractis magnifica) Maldives. Indian Ocean.

Pascal Kobeh / School of Mackerel scads (Decapterus macarellus) swimming over reef with Maldives anemonefish (Amphiprion nigripes) in Magnificent sea anemones (Heteractis magnifica) Maldives. Indian Ocean.

Mark Carwardine / Great white shark (Carcharodon carcharias) underwater, Guadalupe Island, Mexico (North Pacific) With mackerel scad

Todd Mintz / Young man snorkelling next to dense shoal of Scad fish / Horse mackerel (Trachurus trachurus) Bonaire, Dutch Caribbean.

Todd Mintz / Bar Jack (Caranx ruber) predating on dense school of Scad fish / Horse mackerel (Trachurus trachurus) Bonaire, Dutch Caribbean.

Todd Mintz / Dense shoal of Scad fish / Horse mackerel (Trachurus trachurus) shoal, Bonaire, Dutch Caribbean.

Todd Mintz / Person snorkelling next to dense shoal of Scad fish / Horse mackerel (Trachurus trachurus) Bonaire, Dutch Caribbean.

Todd Mintz / Bar Jack (Caranx ruber) predatingdense school of Scad fish / Horse mackerel (Trachurus trachurus) Bonaire, Dutch Caribbean.

Todd Mintz / Bar Jack (Caranx ruber) predating dense school of Scad fish / Horse mackerel (Trachurus trachurus) Bonaire, Dutch Caribbean.

Jane Burton / Horse mackerel / Scad {Trachurus trachurus}