Franco Banfi / Striped marlin (Kajikia audax) hunting Sardine (Sardinops sagax) in bait ball. Magdalena Bay, Baja California Sur, Mexico.

Franco Banfi / Striped marlin (Tetrapturus audax) feeding on Sardine (Sardinops sagax). Magdalena Bay, Baja California Sur, Pacific Ocean, Mexico.

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.

Claudio Contreras / Atlantic sailfish (Istiophorus albicans) attacking school of Sardine (Sardinella aurita) bait ball, Isla Mujeres, Caribbean Sea, Mexico, February

Nick Upton / Blind adult male Grey seal (Halichoerus grypus) 'Marlin' waving a flipper at the edge of a convalescence pool where he is a long-term resident, Cornish Seal Sanctuary, Gweek, Cornwall, UK, January. Mo...

Richard Herrmann / Yellowfin Tuna (Thunnus albacares) and Blue Marlin (Makaira nigricans) beside floating kelp, Nine Mile Bank, San Diego, California

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

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

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

Doug Perrine / Bryde's whale (Balaenoptera brydei / edeni) expeling air and water from mouth through baleen plates after engulfing part of a baitball of Sardines (Clupeidae) with California sea lion (Tetreapturus au...

Doug Perrine / Bryde's whale (Balaenoptera brydei / edeni) swimming past a baitball of Sardines (Clupeidae)California sea lion (Tetreapturus audax) and Striped marlin (Zalophus californianus) in background. Off Baja...

Doug Perrine / Striped marlin {Tetrapturus audax} feeding on baitball of Sardines {Sardinops sagax} off Baja California, Mexico