Espen Bergersen / Short-finned pilot whale (Globicephala macrorhynchus) pod at surface, Tenerife, Spain.

Espen Bergersen / Short-finned pilot whale (Globicephala macrorhynchus) dorsal fin, Tenerife, Spain. November.

Sergio Hanquet / Short-finned pilot whale (Globicephala macrorhynchus) dorsal fin. Tenerife, Canary Islands.

Sergio Hanquet / Short-finned pilot whale (Globicephala macrorhynchus) dorsal fin at surface. Tenerife, Canary Islands.

Felis Images / Short fin mako shark (Isurus oxyrinchus) head discarded on ground, fins were dispatched for export and remaining meat cubed for sale locally. Negombo Fish Market, Sri Lanka. 2017. Photo Vydhehi Kadur/...

Jordi Chias / Short-finned pilot whale (Globicephala macrorhynchus) mother and calf surfacing, South Tenerife, Canary Islands, Atlantic Ocean, July

Franco Banfi / Short-finned pilot whale (Globicephala macrorhynchus) surfacing Dominica, Caribbean Sea, Atlantic Ocean..

Franco Banfi / Two Short-finned Pilot Whales (Globicephala melaena) surfacing showing dorsal fin, Dominica, Caribbean Sea, Atlantic Ocean.

Mark Carwardine / Blue whale (Balaenoptera musculus) surfacing alongside Short-finned pilot whale (Globicephala macrorhynchus) Sea of Cortez, Gulf of California, Baja California, Mexico, February

Mark Carwardine / Blue Whale (Balaenoptera musculus) dorsal fin with two remoras and barnacles, Gulf of California, Baja California, Mexico

Chris & Monique Fallows / Short fin mako shark (Isurus oxyrinchus) with sunrays, Cape Point, South Africa, May.

Roland Seitre / Short-finned pilot whale (Globicephala macrorhynchus) surfacing, Canada.

Yumiko Wakisaka / Long-finned Pilot Whale (Globicephala melas)

Roland Seitre / Long-finned Pilot Whale (Globicephala melas) pod

Roland Seitre / Long-finned Pilot Whale (Globicephala melas) pod

Roland Seitre / Long-finned Pilot Whale (Globicephala melas) surfacing

Pete Oxford / Remora (Remora remora) showing sucker-like first dorsal fin, Umkomaas, Kwazulu Natal, South Africa

Cyril Ruoso / Long-finned Pilot Whale (Globicephala melas) subsistence hunting, 150 harvested, Faroe Islands

Cyril Ruoso / Long-finned Pilot Whale (Globicephala melas) subsistence hunting, 150 harvested, Faroe Islands

Cyril Ruoso / Long-finned Pilot Whale (Globicephala melas) subsistence hunting, two locals haul away tail, Faroe Islands

Cyril Ruoso / Long-finned Pilot Whale (Globicephala melas) subsistence hunting, 150 harvested, Faroe Islands

Mark Carwardine / Short finned pilot whale {Globicephala macrorhynchus} Tenerife, Canary Is

Mark Carwardine / Short finned pilot whale fin {Globicephala macrorhynchus} Tenerife, Canary Is

Mark Carwardine / Short finned pilot whale {Globicephala macrorhynchus} Tenerife, Canary Is

Suzi Eszterhas / Short-finned Pilot Whale (Globicephala macrorhynchus) surfacing, Sea of Cortez, Baja California, Mexico

Mark Carwardine / Short-finned pilot whale (Globicephala macrorhynchus) with fin missing, probably cut off by boat propeller, Sea of Cortez, Baja California, Mexico

Pete Oxford / Long-finned Pilot Whale (Globicephala melas) bones, Elephant Beach, northern East Falkland, Falkland Islands

Pete Oxford / Long-finned Pilot Whale (Globicephala melas) bones, Elephant Beach, northern East Falkland, Falkland Islands

Jeff Rotman / Short-fin Squid (Illex illecebrosus) swimming in open ocean, North Atlantic, USA

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) in coastal waters, Golden Bay, South Island, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) pod swimming closely together in coastal waters, showing burn from stranding, Golden Bay, South Island, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) pod swimming closely together in coastal waters, Golden Bay, South Island, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) Department of Conservation rescue team escorting pod into deeper water after stranding, Golden Bay, South Island, New Zealand

Todd Pusser / Short fin pilot whale {Globicephala macrorhynchus} swimming underwater, Bahamas

Mike Parry / Short-finned Pilot Whale (Globicephala macrorhynchus) group surfacing, Hawaii

Mike Parry / Short-finned Pilot Whale (Globicephala macrorhynchus) group surfacing, Hawaii

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) mass stranding with volunteers working to keep them cool, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) stranded pod of 65, young volunteers comfort and cool tiny calf while waiting for rising tide, Golden Bay, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) stranded pod of 65, young volunteers comfort and cool a cow and tiny calf while waiting for rising tide, Golden Bay, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) largest male in stranded population of 65, volunteers keep animals cool while waiting for rising tide, Golden Bay, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) rescued from stranding, Golden Bay, South Island, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) kept cool with water from volunteers until high tide, Golden Bay, New Zealand

Tui De Roy / Long-finned Pilot Whale (Globicephala melas) kept cool with water from volunteers until high tide, Golden Bay, New Zealand

Flip Nicklin / Short-finned Pilot Whale (Globicephala macrorhynchus) surfacing

Flip Nicklin / Short-finned Pilot Whale (Globicephala macrorhynchus) pod surfacing, Hawaii

Flip Nicklin / Long-finned Pilot Whale (Globicephala melas) adult portrait

Flip Nicklin / Short-finned Pilot Whale (Globicephala macrorhynchus) mother and calf, Hawaii

Flip Nicklin / Short-finned Pilot Whale (Globicephala macrorhynchus) group underwater, Hawaii

Flip Nicklin / Long-finned Pilot Whale (Globicephala melas) portrait, North America

Flip Nicklin / Long-finned Pilot Whale (Globicephala melas) portrait, North America

David Fleetham / Close-up of dorsal fin of adult male short-finned pilot whale (Globicephala macrorhynchus), several miles off the Kona Coast of Hawaii.

Pete Oxford / Remora (Remora remora) showing sucker-like first dorsal fin, Umkomaas, Kwazulu Natal, South Africa

Pete Oxford / Remora (Remora remora) showing sucker-like first dorsal fin, Umkomaas, Kwazulu Natal, South Africa

Flip Nicklin / Blue Whale (Balaenoptera musculus) with remoras attached to dorsal fin, Mexico

Doug Allan / Humpback whale (Megaptera novaeangliae) female with shoal of Remora (Remora remora) attached to underside and calf surfacing, Vava'u, Kingdom of Tonga, South Pacific, 2006.

Nick Upton / Short-finned pilot whale (Globicephala macrorhynchus) mother and calf surfacing near Dolphin and Whale watching trip, Tenerife, Canary Islands, Atlantic Ocean, October.

Nick Upton / Short-finned pilot whales (Globicephala macrorhynchus) surfacing near Dolphin and Whale watching trip, Tenerife, Canary Islands, Atlantic Ocean, October.

Franco Banfi / Common dolphin pod (Delphinus delphis) at sea surface. Horta island, Azores, Atlantic Ocean.

Georgette Douwma / Surgeonfish composite image on black background, Bluespine surgeonfish (Naso unicornis), Striped surgeonfish (Acanthurus lineatus), Sailffin tang (Zebrasoma veliferum) juvenile, Mimic surgeonfish (Aca...

Sergio Hanquet / Pilot whale (Globicephala macrorhynchus) with tooth mark wounds probably caused by another individual of the same species, Tenerife, Canary Islands.

Sergio Hanquet / Whale louse (Cyamidae), a frequent cutaneous parasite in cetaceans, on a small scar of a pilot whale (Globicephala macrorhynchus), Tenerife, Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macrorhynchus) pod, at surface, Montana de Guaza, Arona. Tenerife, Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macrorhynchus) at the surface, Tenerife. Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macrorhynchus) with scars and scratches. Tenerife, Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macorhynchus) at surface. Specimen with parasite (Xenobalanus globicipitis) on dorsal fin Tenerife, Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macorhynchus) at surface. Coast of Punta Rasca. Tenerife, Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macorhynchus) at surface. Montana de Guaza,Tenerife, Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macorhynchus) dorsal fin. near the coast of Los Cristianos, Tenerife. Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macorhynchus) at surface before diving, Tenerife, Canary Islands.

Sergio Hanquet / Pilot whale (Globicephala macorhynchus) group at surface. Tenerife, Canary Islands.

Franco Banfi / Short-finned pilot whale (Globicephala macrorhynchus) dorsal fin at surface . South Tenerife, Canary Islands, Atlantic Ocean

Franco Banfi / Short-finned pilot whale (Globicephala macrorhynchus) dorsal fin surfacing. South Tenerife, Canary Islands, Atlantic Ocean

Martin Camm / Carwardine / Common dolphin (Delphinus delphis) adult dorsal fin variations delphis subspecies No more than 15 illustrations by Martin Camm, Rebecca Robinson and/or Toni Llobet to be used in a single proje...

Martin Camm / Carwardine / Short-finned pilot whale (Globicephala macrorhynchus) adult male dorsal fin variations No more than 15 illustrations by Martin Camm, Rebecca Robinson and/or Toni Llobet to be used in a single...

Martin Camm / Carwardine / Short-finned pilot whale (Globicephala macrorhynchus) Long-finned pilot whale (Globicephala melas) adult flipper or pectoral fin comparison (short-finned left, long-finned right) No more than...

Solvin Zankl / Wild Wonders of Europe / Loggerhead sea turtles (Caretta caretta) overgrown by algae with Remora (Remora remora) Turkey, July.