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

Juan Carlos Munoz / Albacore / Longfin tuna (Thunnus alalunga) caught fish, tails on ice. Santona, Cantabria, Spain. August 2011.

Juan Carlos Munoz / Fishermen sorting Albacore / Longfin tuna (Thunnus alalunga) fish catch on dock in early morning. Santona, Cantabria, Spain. August 2011.

Juan Carlos Munoz / Fishermen sorting Albacore / Longfin tuna (Thunnus alalunga) fish catch on dock in early morning. Santona, Cantabria, Spain. August 2011.

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...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) feeding on tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an ef...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) feeding on tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an ef...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) feeding on tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an ef...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) feeding on tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an ef...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) feeding on tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an ef...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) feeding on tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an ef...

Franco Banfi / Yellowfin tuna (Thunnus albacares)? with shark in background, Roca Partida close to San Benedicto island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Western Mexico

Chris & Monique Fallows / Yellowfin tuna (Thunnus albacares) feeding on a baitball, Cape Point, South Africa.

Franco Banfi / Albacore tuna (Thunnus alalunga), Formigas Islet dive site, Azores, Atlantic Ocean

Pascal Kobeh / Drag net of a seine fishing vessel full of Yellowfin tuna (Thunnus albacares), Los Roques, Venezuela. Caribbean.

Alex Mustard / School of large Atlantic bluefin tuna (Thunnus thynnus) captive in growing pen. Depsite looking much smaller in the photo, these fish were 1.5m (5ft) long. Malta. Mediterranean Sea.

David Fleetham / Yellowfin tuna (Thunnus albacares) swimming through open water, Guadalupe Island, Mexico, Pacific Ocean.

David Fleetham / Yellowfin tuna (Thunnus albacares) swimming in open ocean, Gudalupe Island, Baja California, Mexico, Pacific Ocean.

Henley Spiers / Subsistence spearfisherman hunting Yellowfin tuna (Thunnus albacares), Costa Rica, Central America, Pacific Ocean. 2020

Henley Spiers / Yellowfin tuna (Thunnus albacares) school, Costa Rica, Pacific Ocean.

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) bull feeding on Yellowfin Tuna (Thunnus albacares) prey, which it has herded into shallow water, Punta Albemarle, Isabela Island, Galapagos Islands, Ecuador

Sergio Hanquet / Artisanal and selective fishing for tuna. Albacore (Thunnus alalunga) locally called barrilote. Arrival at the Port of Los Cristianos, Tenerife. Sustainable fishing, Canary Islands. Atlantic Ocean, Ma...

Sergio Hanquet / Artisanal and selective fishing for tuna. Albacore (Thunnus alalunga). Arrival at the Port of Los Cristianos, Tenerife. Canary Islands. Atlantic Ocean.

David Fleetham / Yellowfin tuna (Thunnus albacores) and other open ocean fish species displayed for auction at the Honolulu United Fishing Agency's daily fish auction near Kewalo Basin on Oahu, Hawaii. The only co...

Doug Perrine / Yellowfin tuna (Thunnus albacares) and Pantropical spotted dolphin (Stenella attenuata) pod feeding on bait fish beneath water surface. Pacific Ocean, Southern Costa Rica.

Doug Perrine / Yellowfin tuna (Thunnus albacares) school. Pacific Ocean, Southern Costa Rica.

Doug Perrine / Yellowfin tuna (Thunnus albacares) hooked on lure with treble hook. Pacific Ocean, Cabo San Lucas, Baja California, Mexico. 2009.

Doug Perrine / Yellowfin tuna (Thunnus albacares) hooked on lure with treble hook. Pacific Ocean, Cabo San Lucas, Baja California, Mexico. 2009.

Doug Perrine / Magnificent frigate bird (Fregata magnificens) feeding from above and Yellowfin tuna (Thunnus albacares) feeding from below on Sardine bait ball. Splashes from Sardines attempting to escape. Sport fis...

Doug Perrine / Magnificent frigate bird (Fregata magnificens) feeding from above and Yellowfin tuna (Thunnus albacares) feeding from below on Sardine bait ball. Sardines making sea surface boil as they attempt escap...

Doug Perrine / Magnificent frigate bird (Fregata magnificens) feeding from above and Yellowfin tuna (Thunnus albacares) feeding from below on Sardine bait ball. Sardines making sea surface boil as they attempt escap...

Doug Perrine / Yellowfin tuna (Thunnus albacares) and Pantropical spotted dolphins (Stenella attenuata) feeding on bait fish, Pacific Ocean off southern Costa Rica.

Sergio Hanquet / Yellowfin tuna (Thunnus albacares) hunting mackerel (Scomber colias) Tenerife, Canary Islands.

Aflo / Shiba inu raising standing on hind legs in park with autumn leaves on ground.

Aflo / Shiba inu raising one paw in park with autumn leaves on ground.

Aflo / Stray Cat, black and white, pawing, Aichi, Japan.

Kristel Richard / Eagle hunter woman whipping man on slow Mongolian horse to try to slow him down during game at the Eagle hunter's festival. She is on a faster horse but if he wins the game he is entitled to a kiss. E...

Jeff Rotman / Mackerel shark (Lamna nasus) for sale at the Mumbai Fish Market. Mumbai, India.

Mark Taylor / Ginger kittens wrapped in red tinsel and holly berries.

Mark Taylor / Ginger kitten, Tom, age 8 weeks reaching up a paw with a mallard duckling in front. Digital Composite.

David Tipling / Cornice block of the Ibis headed Thoth poured water over the head of the King. Dating to AD 41-68 from a screen wall in the temple of Harendotes (Horus the Avenger) on the island of Philae, Lake Nasse...

Loic Poidevin / Juvenile Grizzly bear (Ursus arctos horribilis) lying in grass with arm raised in the air, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Kristel Richard / Bas-reliefs with soldiers mounted on horses, decorating the ground level of the temple at Angkor Wat, Angkor, Cambodia. March 2013

Staffan Widstrand / Wild Wonders of China / Female Yunnan Snub-nosed monkey (Rhinopithecus bieti) feeding, Tacheng Yunnan snub-nosed monkey National Park, Yunnan, China.