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Teeming with images of spectacular underwater scenes from around the world, Call of the Blue is the culmination of a five-year project by the photographer and ocean conservationist Philip Hamilton. This groundbreaking book includes contributions from acclaimed scientists and ocean “guardians”, who reveal what drove them to answer the call of the blue. Here: Native to the Indo-Pacific, lionfish are voracious hunters, feeding on other fish from coastal mangroves down to a depth of more than 300 metres. They disorientate their prey by blowing a jet of water at them before swallowing them whole. (Photo by Philip Hamilton/The Guardian)

Teeming with images of spectacular underwater scenes from around the world, Call of the Blue is the culmination of a five-year project by the photographer and ocean conservationist Philip Hamilton. This groundbreaking book includes contributions from acclaimed scientists and ocean “guardians”, who reveal what drove them to answer the call of the blue. Here: Native to the Indo-Pacific, lionfish are voracious hunters, feeding on other fish from coastal mangroves down to a depth of more than 300 metres. They disorientate their prey by blowing a jet of water at them before swallowing them whole. (Photo by Philip Hamilton/The Guardian)



Anemonefish, also known as clownfish, among the protective tentacles of their home. (Photo by Philip Hamilton/The Guardian)

Anemonefish, also known as clownfish, among the protective tentacles of their home. (Photo by Philip Hamilton/The Guardian)



A mushroom coral ghost shrimp. (Photo by Philip Hamilton/The Guardian)

A mushroom coral ghost shrimp. (Photo by Philip Hamilton/The Guardian)



The fragile Degrave’s cleaner shrimp. (Photo by Philip Hamilton/The Guardian)

The fragile Degrave’s cleaner shrimp. (Photo by Philip Hamilton/The Guardian)



The spectacular, slow-moving leafy seadragon likes to camouflage itself around kelp-covered rocks and seagrass. It has leaf-shaped appendages over its entire body, blending in perfectly with its seaweed and kelp habitat. (Photo by Philip Hamilton/The Guardian)

The spectacular, slow-moving leafy seadragon likes to camouflage itself around kelp-covered rocks and seagrass. It has leaf-shaped appendages over its entire body, blending in perfectly with its seaweed and kelp habitat. (Photo by Philip Hamilton/The Guardian)



The bignose unicornfish can hide its markings while sleeping or when frightened. (Photo by Philip Hamilton/The Guardian)

The bignose unicornfish can hide its markings while sleeping or when frightened. (Photo by Philip Hamilton/The Guardian)



Look closely at the green turtle’s beak and you may see the serrated edges used to slice the seagrass blades which make up most of its diet. Green turtles are one of the largest hardback turtles, their carapace measuring up to 1.5 metres long. Turtles use a number of cues, including the position of the sun and the earth’s magnetic field, to navigate to and from their foraging and nesting grounds. (Photo by Philip Hamilton/The Guardian)

Look closely at the green turtle’s beak and you may see the serrated edges used to slice the seagrass blades which make up most of its diet. Green turtles are one of the largest hardback turtles, their carapace measuring up to 1.5 metres long. Turtles use a number of cues, including the position of the sun and the earth’s magnetic field, to navigate to and from their foraging and nesting grounds. (Photo by Philip Hamilton/The Guardian)



Loggerhead turtles are omnivorous, using their powerful jaws to crack into the shells of gastropods as well as feeding on sponges, worms, crustaceans, sea cucumbers and starfish. (Photo by Philip Hamilton/The Guardian)

Loggerhead turtles are omnivorous, using their powerful jaws to crack into the shells of gastropods as well as feeding on sponges, worms, crustaceans, sea cucumbers and starfish. (Photo by Philip Hamilton/The Guardian)



Green turtles take special care of their carapace, scraping algae off on rocks or letting cleaner fish remove parasites. Thanks to long-term protection of nesting sites, and measures to reduce the numbers caught in fishing gear, some green turtle populations are starting to recover. (Photo by Philip Hamilton/The Guardian)

Green turtles take special care of their carapace, scraping algae off on rocks or letting cleaner fish remove parasites. Thanks to long-term protection of nesting sites, and measures to reduce the numbers caught in fishing gear, some green turtle populations are starting to recover. (Photo by Philip Hamilton/The Guardian)



Marine iguanas are the only reptiles to feed exclusively on algae. After their foraging excursions in the sea, they will bask in the sun to warm up. (Photo by Philip Hamilton/The Guardian)

Marine iguanas are the only reptiles to feed exclusively on algae. After their foraging excursions in the sea, they will bask in the sun to warm up. (Photo by Philip Hamilton/The Guardian)



West Indian manatees – or sea cows – are found throughout the Caribbean but there loss of habitat, entanglement in fishing gear and collisions with boats threaten the population. (Photo by Philip Hamilton/The Guardian)

West Indian manatees – or sea cows – are found throughout the Caribbean but there loss of habitat, entanglement in fishing gear and collisions with boats threaten the population. (Photo by Philip Hamilton/The Guardian)



Common dolphins display a variety of playful behaviours, from breaching and somersaulting to playing in the bow waves of boats. (Photo by Philip Hamilton/The Guardian)

Common dolphins display a variety of playful behaviours, from breaching and somersaulting to playing in the bow waves of boats. (Photo by Philip Hamilton/The Guardian)



Long-beaked common dolphins can live in pods of hundreds or even thousands. (Photo by Philip Hamilton/The Guardian)

Long-beaked common dolphins can live in pods of hundreds or even thousands. (Photo by Philip Hamilton/The Guardian)



Australian sea lions warming themselves in the shallows. (Photo by Philip Hamilton/The Guardian)

Australian sea lions warming themselves in the shallows. (Photo by Philip Hamilton/The Guardian)



Endemic to southern and western Australia, the Australian sea lion is endangered. Its complex breeding cycle makes population recovery or even maintenance difficult. (Photo by Philip Hamilton/The Guardian)

Endemic to southern and western Australia, the Australian sea lion is endangered. Its complex breeding cycle makes population recovery or even maintenance difficult. (Photo by Philip Hamilton/The Guardian)



Great white sharks live mostly in tropical and temperate waters, such as the Mediterranean Sea, and are most abundant around large colonies of seals, sea lions and cetaceans. (Photo by Philip Hamilton/The Guardian)

Great white sharks live mostly in tropical and temperate waters, such as the Mediterranean Sea, and are most abundant around large colonies of seals, sea lions and cetaceans. (Photo by Philip Hamilton/The Guardian)



Great whites, which have a slow reproductive rate and are targeted for commercial and sport fishing, are continuously declining in numbers. (Photo by Philip Hamilton/The Guardian)

Great whites, which have a slow reproductive rate and are targeted for commercial and sport fishing, are continuously declining in numbers. (Photo by Philip Hamilton/The Guardian)



The humpback whale travels up to 15,000 miles (25,000km) living off its fat reserves as it migrates from the food-rich polar regions to subtropical waters to breed and give birth. (Photo by Philip Hamilton/The Guardian)

The humpback whale travels up to 15,000 miles (25,000km) living off its fat reserves as it migrates from the food-rich polar regions to subtropical waters to breed and give birth. (Photo by Philip Hamilton/The Guardian)



Sperm whales socialise on the surface but dive to depths of more than 1,000 metres in search of the squid they feed on. (Photo by Philip Hamilton/The Guardian)

Sperm whales socialise on the surface but dive to depths of more than 1,000 metres in search of the squid they feed on. (Photo by Philip Hamilton/The Guardian)
23 Nov 2018 00:03:00