Wildlife photographer Danté Fenolio has headed into areas untouched by sunlight – deep seas, caves and underground – and found creatures that are exploding with colour. First are these blue-spotted jawfishes, which live in tropical reefs in the eastern-central Pacific Ocean, including the Gulf of California. They live in burrows that they block themselves inside each evening. In the morning, they remove the debris so they can pass through the burrow opening again• Life in the Dark is out now, published by Johns Hopkins University Press