Tony Wu / Indo-Pacific sailfish (Istiophorus platypterus) in feeding frenzy, with the remains of a previously large school of sardines (Sardina sp) in background. Isla Mujeres, Cancun, Mexico.

Chris & Monique Fallows / Indo Pacific Sailfish (Istiophorus platypterus) feeding on sardines (Sardina pilchardus), Isla Mujeres, Mexico, March.

Chris & Monique Fallows / Cape Gannet (Morus capensis) feeding on sardines, Port St Johns, Transkei, South Africa.

Chris & Monique Fallows / Common dolphin (Dephinus delphis) feeding on sardines (Sardinops oecllata) East London, South Africa.

Chris & Monique Fallows / Common dolphin (Dephinus delphis) pod feeding on sardines (Sardinops oecllata) East London, South Africa.

Chris & Monique Fallows / Common dolphin (Dephinus delphis) pod feeding on sardines (Sardinops oecllata) East London, South Africa.

Pascal Kobeh / Sailfish (Istiophorus albicans) hunting Sardines (Sardinella), Yucatan Peninsula, Mexico. Caribbean Sea.

Jeff Rotman / Purse seine fishing boat hauling in net full of Sardines (Sardina sp) Agadir, Morocco, Atlantic Ocean.

Chris & Monique Fallows / Common dolphin (Delphinus delphis) feeding on Sardines (Sardinops sagax) East London, South Africa

Chris & Monique Fallows / Indo Pacific Sailfish (Istiophorus platypterus) feeding on sardines, Isla Mujeres, Mexico.

Franco Banfi / Jars of Anchovies, sardines and capers for sale in the Market of Vis Island, Croatia, Adriatic Sea, Mediterranean

Henley Spiers / Blue-footed booby (Sula nebouxii) swimming up towards the surface with Sardine (Sardina sp.) prey in mouth, with shoal beneath, Espiritu Santo Island, Baja California Sur, Mexico, Pacific Ocean. Bird...