In 2016, I was sent to Sri Lanka by Blue Planet 2, on the hunt for sperm whales. This shoot involved spending what cumulatively added up to many hundreds of hours out in the deep blue, scouring the ocean for signs of sperms whales.
Sri Lanka is a global cetacean hotspot, and we were lucky enough to spot not only many many sperm whales, but also Blue, Brydes, Omuras, Orca and Pilot whales.
A few of my sperm whale shots made it into the open ocean programme of the series - 'Deep Blue'. You can watch a clip about what it takes to film sperm whales here;