Ralph Pace / Silky Shark (Carcharhinus falciformis), Galapagos Shark (Carcharhinus galapagensis), Dusky Shark (Carcharhinus obscurus), and Black-tip Shark (Carcharhinus limbatus) group working with Yellowfin Tuna...

Ralph Pace / Silky Shark (Carcharhinus falciformis), Galapagos Shark (Carcharhinus galapagensis), Dusky Shark (Carcharhinus obscurus), and Black-tip Shark (Carcharhinus limbatus) group working with Yellowfin Tuna...

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

Chris & Monique Fallows / Blue Sharks (Prionace glauca) and Yellowfin tuna (Thunnus albacares) Cape Point, South Africa.

Doc White / Yellow fin tuna (Thunnus albacares) shoal caught 275ft purse seiner fishing nets, Pacific ocean, Mexico.

David Tipling / Yellowfin tuna (Thunnus albacares) for sale at fish market. Honiara, Guadalcanal, Solomon Islands. 2018.

David Tipling / Yellowfin tuna (Thunnus albacares) for sale at fish market. Honiara, Guadalcanal, Solomon Islands. 2018.

David Fleetham / Yellowfin tuna (Thunnus albacares) Gudalupe Island, Mexico.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) hunting tuna, with scavenging Magnificent frigatebird (Fregata magnificens). A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a sm...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) hunting tuna, with Blacktip shark (Chacharhinus limbatus) swimming nearby. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a smal...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) hunting tuna, with Blacktip shark (Chacharhinus limbatus) and Green turtle (Chelonia mydas) swimming nearby. A group of the sea lion bulls have learnt to herd...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) feeding on tuna watched by scavengers, including, Brown pelican (Pelecanus occidentalis urinator), Great blue heron (Ardea herodias), and Sally lightfoot crab...