basking sharks<\/a> come to our shores in summer to feed and breed. This all depends on the richness of our seas and we need to improve the way we treat our seas if we are to enjoy such wildlife wonders in our waters in the future.<\/p>\nWhat are the main challenges when filming underwater?<\/h3>\n
The main challenges for the ocean team were the ever-changing conditions on and in the sea. Sunny days are best for filming but when working in the water, underwater visibility is also a major factor determining our success. The visibility could change daily, making what was a stunningly beautiful location on one day seem like green soup the next!<\/p>\n
How did you film the bioluminescence scene?<\/h3>\n
Bioluminescence is light made by algae and animals in the sea and it is surprisingly abundant in the ocean. But until recently, our cameras have not been light sensitive enough to capture these faint lights. For the bioluminescence sequence in the Ocean<\/em> episode, we used a newly developed low-light camera that could capture the bioluminescence in full 4K resolution.<\/p>\nMain image: Eurasian otter returning to shore with a large shore crab. \u00a9 BBC\/Silverback Films\/Richard Shucksmith<\/em><\/p> <\/body><\/html>\n
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