Sergio Hanquet / Pink whipray (Pateobatis fai) swimming in open ocean, Male Atoll. Maldives, Indian Ocean.

Sergio Hanquet / Two Nurse sharks (Nebrius ferrugineus) swimming over coral reef and seabed, Maldives, Indian Ocean.

Sergio Hanquet / Giant guitarfish (Rhynchobatus djiddensis) resting on seabed, Male Atoll, Maldives, Indian Ocean.

Sergio Hanquet / Longfin batfish (Platax teira) head portrait, Maldives, Indian Ocean.

Sergio Hanquet / Pennant coralfish (Heniochus acuminatus) shoal, Maldives, Indian Ocean.

Sergio Hanquet / Yellowmargin moray (Gymnothorax flavimarginatus) resting on coral reef, Maldives, Indian Ocean.

Sergio Hanquet / Necklace starfish (Fromia monilis) portrait, Ari Atoll, Maldives, Indian Ocean.

Sergio Hanquet / Necklace starfish (Fromia monilis) resting on coral reef, Ari Atoll, Maldives, Indian Ocean.

Sergio Hanquet / Granulated sea star (Choriaster granulatus) resting on coral reef, Ari Atoll, Maldives, Indian Ocean.

Sergio Hanquet / Stony cup coral (Dendrophyllia sp.) surrounded by various reef fish on coral reef, Ari Atoll, Maldives, Indian Ocean.

Sergio Hanquet / Giant clam (Tridacna gigas) on coral reef with shoal of fish swimming by in background, Ari Atoll, Maldives, Indian Ocean.

Sergio Hanquet / Palythoa covered coral reef and various species of reef fish, Ari Atoll, Maldives, Indian Ocean.

Sergio Hanquet / RF - Nurse shark (Nebrius ferrugineus) resting on seabed at night, Maldives, Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

Sergio Hanquet / RF - Yellowtail clownfish (Amphiprion clarkii) sheltering in its Sea anemone (Actiniaria), Maldives, Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

Sergio Hanquet / RF - Yellowmargin moray (Gymnothorax flavimarginatus) with mouth open displaying aggression, Maldives, Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

Sergio Hanquet / RF - Coral grouper (Cephalopholis urodeta) portrait, Maldives, Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

Sergio Hanquet / RF - Necklace starfish (Fromia monilis) on coral reef, Ari Atoll, Maldives, Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

Jacob Guy / Common seahorse (Hippocampus sp.) using its prehensile tail to hold onto the coral in a current, Lembeh Strait, Indonesia.

Jacob Guy / Tracking shot of a pregnant Common seahorse (Hippocampus sp.) swimming along the seabed, Lembeh Strait, Indonesia.

Jacob Guy / Blackfin snake eel (Ophichthus altipennis) head above sand. The animal is waiting for prey to pass over. The rest of its body is buried beneath the sand. Lembeh Strait, Indonesia.

Jacob Guy / Close up of Thorny seahorse (Hippocampus histrix) head. The eyes of the animal can be seen moving as it looks around. Lembeh Strait, Indonesia.

Jacob Guy / Close up of Hairy frogfish (Antennarius striatus) crawling along the sandy seabed, Lembeh Strait, Indonesia.

Jacob Guy / Lemon goby (Gobiodon citrinus) using bottle as a home. The fish swims towards the top of the bottle. Lembeh Strait, Indonesia.

Jacob Guy / Close up of Ornate ghost pipefish (Solenostomus paradoxus) courting, Lembeh Strait, Indonesia.

Jacob Guy / Close up of Ornate ghost pipefish (Solenostomus paradoxus) pair courting. The male swims round the female. Lembeh Strait, Indonesia.

Jacob Guy / Clown fish (Amphiprion sp.) swimming in Carpet anemone (Stichodactyla gigantea), Lembeh Strait, Indonesia.

Jacob Guy / Hairy frogfish (Antennarius striatus) opening its mouth. The animal is sitting on a sandy seabed. Lembeh Strait, Indonesia.

Jacob Guy / Close up of Hispid frogfish (Antennarius hispidus) resting, Lembeh Strait, Indonesia.

Jacob Guy / Hairy frogfish (Antennarius striatus) resting on sandy seabed, Lembeh Strait, Indonesia.

David Hall / Giant oceanic manta ray (Mobula birostris) somersaulting while feeding on plankton, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangered.

David Hall / Giant oceanic manta ray (Mobula birostris) somersaulting while feeding on plankton, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangered.

David Hall / Black durgon (Melichthys niger) school swimming over reef, Big Island, Hawaii, Pacific Ocean.

David Hall / Giant oceanic manta ray (Mobula birostris) with two Remoras (Remora remora) attached, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangered.

David Hall / Giant oceanic manta ray (Mobula birostris) swimming over volcanic rock with two Remoras (Remora sp.) attached in front and a Clarion angelfish "cleaner" (Holacanthus clarionensis) following behind, So...

David Hall / Three Yellow tangs (Zebrasoma flavescens) feeding on algae on a Green sea turtle (Chelonia mydas) at reef "cleaning station", Big Island, Hawaii, Pacific Ocean. Endangered.

David Hall / Yellow tangs (Zebrasoma flavescens) and Brown surgeonfish (Acanthurus nigrofuscus) cleaning a Green sea turtle (Chelonia mydas) at "cleaning station", feeding on alage on turtle's skin and shell,...

David Hall / Three Green sea turtles (Chelonia mydas) at a cleaning station with Brown Surgeonfish (Acanthurus nigrofuscus) waiting nearby, Big Island, Hawaii, Pacific Ocean. Endangered.

David Hall / Giant oceanic manta ray (Mobula birostris) with two Remoras (Remora sp.) swimming underneath, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangered.

David Hall / Giant oceanic manta ray (Mobula birostris) with two Remoras (Remora sp.) attached underneath, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangered.

David Hall / Giant oceanic manta ray (Mobula birostris) being followed by two Remoras (Remora sp.) and a group of Clarion angelfish (Holacanthus clarionensis), Revillagigedo Islands, Mexico, Pacific Ocean. Endange...

David Hall / Giant oceanic manta ray (Mobula birostris) with two Remoras (Remora sp.) and shoal of Black jacks (Caranx lugubris) swimming alongside, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangere...

David Hall / Giant oceanic manta ray (Mobula birostiris) with a Remora (Remora sp.) and two Black jacks (Caranx lugubris) swimming beneath it, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangered.

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus), Barred flagtails (Kuhlia mugil) and a single Black jack (Caranx lugubris), Revillagigedo Islands, Mexico, Pacific Ocean.

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus) and Barred flagtails (Kuhlia mugil) with Black durgons (Melichthys niger) and Redtail triggerfish (Xanthichthys mento), Re...

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus), Revillagigedo Islands, Mexico, Pacific Ocean.

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus) and a single Black durgon (Melichthys niger), Revillagigedo Islands, Mexico, Pacific Ocean.

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus), Barred flagtails (Kuhlia mugil) with Black durgons (Melichthys niger) and Redtail triggerfish (Xanthichthys mento), Revil...

David Hall / Large wave breaking on volcanic rocks with schooling Barred flagtails (Kuhlia mugil), Revillagigedo Islands, Mexico, Pacific Ocean.

David Hall / Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus) and two Redtail triggerfish (Xanthichthys mento), Revillagigedo Islands, Mexico, Pacific Ocean.

David Hall / RF - Green sea turtle (Chelonia mydas) at a turtle "cleaning station" being cleaned by Brown surgeonfish (Acanthurus nigrofuscus) and Yellow tangs (Zebrasoma flavescens), Big Island, Hawaii, Pacific O...

David Hall / RF - Giant oceanic manta ray (Mobula birostris) portrait, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangered. (This image may be licensed either as rights managed or royalty free.)

David Hall / RF - Giant oceanic manta ray (Mobula birostris) with two Remoras (Remora sp.) attached swimming over volcanic rock, Socorro, Revillagigedo Islands, Mexico, Pacific Ocean. Endangered. (This image may b...

David Hall / RF - Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus) and a single Black jack (Caranx lugubris) swimming by, Revillagigedo Islands, Mexico, Pacific Ocean. (This image may...

David Hall / RF - Waves breaking on volcanic rocks with schooling Green jacks (Caranx caballus), Revillagigedo Islands, Mexico, Pacific Ocean. (This image may be licensed either as rights managed or royalty free.)

Jeff Vanuga / Group of people from Wyoming Game and Fish Department attaching a radio collar to a Rocky Mountain bighorn sheep (Ovis canadensis canadensis) for research purposes, Wyoming USA. March, 2016.

Jeff Vanuga / Group of people from Wyoming Game and Fish Department attaching a radio collar to a Rocky Mountain bighorn sheep (Ovis canadensis canadensis) for research purposes, Wyoming USA. March, 2016.

Will Watson / Pike (Esox lucius) floating dead in river due to depleted oxygen levels caused by pollution and extreme heat, River Wye, Hereford, England, UK. 22nd August 2022.

Will Watson / Pike (Esox lucius) floating dead in river due to depleted oxygen levels caused by pollution and extreme heat, River Wye, Hereford, England, UK. 22nd August 2022.

Tui De Roy / Two Chocolate chip seastars (Nidorellia armata) with Green sea urchin (Lytechinus variegatus) on sea floor, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Panamic cushion seastar (Pentaceraster cumingi) with Gulfweed (Sargassaceae) on sea floor. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Mexican hogfish (Bodianus diplotaenia) with Black-striped salema (Xenocys jessiae) swimming over coral reef. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Cold sea fan (Muricea) community with Blacktip cardinalfish (Apogon atradorsatus) and Chocolate chip seastar (Nidorellia armata) swimming at heart of Cromwell Current upwelling. Isabela Island, Gala...

Tui De Roy / Black-striped salema (Xenocys jessiae) swimming at heart of Cromwell Current upwelling. Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Cold sea fan (Muricea) community with Galapagos black coral (Antipathes galapagensis) and schooling Blacktip cardinalfish (Apogon atradorsatus) at heart of Cromwell Current upwelling. Isabela Island...

Tui De Roy / Cold sea fan (Muricea) community with Galapagos black coral (Antipathes galapagensis) and schooling Blacktip cardinalfish (Apogon atradorsatus) at heart of Cromwell Current upwelling. Isabela Islan...

Tui De Roy / Cold sea fan (Muricea) community with Chocolate chip seastar (Nidorellia armata) and Galapagos black coral (Antipathes galapagensis) at heart of Cromwell Current upwelling. Isabela Island, Galapagos...

Tui De Roy / Cold sea fan (Muricea) community with Galapagos black coral (Antipathes galapagensis), Pacific creolefish (Paranthias colonus) & Damselfish (Pomacentridae) at heart of Cromwell Current upwelling. I...

Tui De Roy / Razor surgeonfish (Prionurus laticlavius) and schooling Blacktip cardinalfish (Apogon atradorsatus) swimming over coral reef with Lobe coral (Porites lobata). Galapagos Islands, Ecuador. Pacific Oce...

Tui De Roy / Razor surgeonfish (Prionurus laticlavius), Blacktip cardinalfish (Apogon atradorsatus) and Black-striped salema (Xenocys jessiae) swimming over coral reef. Galapagos Islands, Ecuador. Pacific Ocean...

Tui De Roy / Razor surgeonfish (Prionurus laticlavius), Flag cabrilla (Epinephelus labriformis) and schooling Pacific creolefish (Paranthias colonus) Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Cold algal community with swimming Black-striped salema (Xenocys jessiae) at heart of Cromwell Current upwelling. Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Spotted eagle ray (Aetobatus narinari) swimming offshore. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Red sun star (Asterias cumingii) and Chocolate chip seastar (Nidorellia armata) amongst Gulfweed (Sargassaceae). Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Peruvian torpedo ray (Torpedo peruana), cold water species found in Cromwell Current upwelling areas, on sea floor. Fernandina Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Panamic cushion seastar (Pentaceraster cumingi) next to red seaweed. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Galapagos octopus (Octopus oculifer) hiding in coral reef with schooling Black-striped salema (Xenocys jessiae) swimming over. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Marbled stingray (Taeniura meyeni) on sea floor. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Green turtle (Chelonia mydas) sleeping on underwater ledge with Panamic cushion seastar (Pentaceraster cumingi) and Galapagos black coral (Antipathes galapagensis). Galapagos Islands, Ecuador. Paci...

Tui De Roy / School of King angelfish (Holacanthus passer) and Dusky chub (Girella freminvillei) gathering together, with Green turtle (Chelonia mydas) in background. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Three Green turtles (Chelonia mydas) visiting cleaning station with King angelfish (Holacanthus passer). Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Green turtle (Chelonia mydas) grazing in lush seaweed pastures. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Green turtle (Chelonia mydas) grazing in lush seaweed pastures, with Black-striped salema (Xenocys jessiae) swimming in background. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Green turtle (Chelonia mydas) visiting cleaning station with King angelfish (Holacanthus passer). Galapagos Islands, Ecuador Pacific Ocean.

Tui De Roy / Shoal of Golden cownose-ray (Rhinoptera steindachneri) swimming. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Giant hawkfish (Cirrhitus rivulatus) swimming next to underwater ledge. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Giant hawkfish (Cirrhitus rivulatus) swimming next to underwater ledge with schooling Blacktip cardinalfish (Apogon atradorsatus). Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) cavorting underwater next to schooling Black-striped salema (Xenocys jessiae). Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) cavorting underwater next to schooling Black-striped salema (Xenocys jessiae). Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Galapagos penguin (Spheniscus mendiculus) chasing small fish into shallow waters. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Galapagos penguin (Spheniscus mendiculus) chasing small fish into shallow waters, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Galapagos penguin (Spheniscus mendiculus) chasing small fish into shallow waters. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Galapagos penguin (Spheniscus mendiculus) chasing small fish into shallow waters with Black-striped salema (Xenocys jessiae) and Mexican hogfish (Bodianus diplotaenia). Galapagos Islands, Ecuador....

Tui De Roy / Galapagos penguin (Spheniscus mendiculus) chasing small fish into shallow waters with schooling Black-striped salema (Xenocys jessiae). Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Galapagos penguin (Spheniscus mendiculus) chasing small fish into shallow waters. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Group of Galapagos penguins (Spheniscus mendiculus) chasing small fish into shallow waters. Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Group of Galapagos penguins (Spheniscus mendiculus) chasing small fish into shallow waters. Galapagos Islands, Ecuador. Pacific Ocean.