Franco Banfi / Shoal of colorful yellow fish Panamic porkfish (Anisotremus taeniatus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Matthew Maran / Meat: Chicken and pork carcasses at supermarket, North London, England

Matthew Maran / Medium cooked sirloin steak (beef)

Daniel Heuclin / Mentawai man dividing cooked pork, Siberut Island, Sumatra. July 2016.

Daniel Heuclin / Mentawai man dividing cooked pork, Siberut Island, Sumatra. July 2016.

Daniel Heuclin / Mentawai man dividing cooked pork, Siberut Island, Sumatra. July 2016.

Claudio Contreras / Panamic pork fish (Anisotremus taeniatus), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Claudio Contreras / Panamic pork fish (Anisotremus taeniatus), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Juan Manuel Borrero / Illustrations of pork tape worm (Taenia solium) with segmented body on the left, cross section of proglottid or body segment on the bottom middle and on the left illustrations of scolex or head. Penci...

Florian Möllers / Chinese butcher preparing pork and cow meat in the market of Zhouzhi town, Qinling Mountains, Shaanxi, China, March 2006

Eric Baccega / Hunters in traditional dress, of the Yali tribe cooking pork on an open fire. Uldam village. West Papua, former Irian-Jaya, Indonesia, August 2002 (West Papua).

Eric Baccega / Dani tribe cooking a traditional pork meal, Baliem valley, West Papua, former Irian-Jaya, Indonesia, August 2002 (West Papua).

Jose B. Ruiz / Assortment of traditional pork sausages made from local meat, Alicante, Spain

Joel Sartore / Photo Ark / White sea pork tunicate (Didemnum candidum) on a stalk of Turtle grass (Thalassia testudinum), Gulf Specimen Marine Lab and Aquarium.

Joel Sartore / Photo Ark / White sea pork tunicate (Didemnum candidum) on a stalk of Turtle grass (Thalassia testudinum), Gulf Specimen Marine Lab and Aquarium.

Pascal Kobeh / School of Panama / Panamic porkfish (Anisotremus taeniatus) swimming in a tight group over the reef, Sea of Cortez, Baja California, Mexico.

Pascal Kobeh / School of Panama / Panamic porkfish (Anisotremus taeniatus) swimming in a tight group over the reef, Sea of Cortez, Baja California, Mexico.

Henley Spiers / School of Panamic porkfish (Anisotremus taeniatus) swimming in formation, Cabo Pulmo National Park, Baja California Sur, Mexico, Pacific Ocean.

Nigel Cattlin / Free range British saddleback pigs in outdoor runs with pig arks and feeders, Hampshire,

David Hall / Lined chiton (Tonicella lineata) with Orange Social Tunicates (Metandrocarpa taylori) and pale orange-yellow California sea pork (Aplidium californicum), Browning Pass, Queen Charlotte Strait, British...