By Tom Gillespie @TomGillespie1
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Videographer / Director: Picture Adventure Exepeditions
Producer: Tom Gillespie, Nick Johnson
Editor: Joshua Douglas
The incredible animals were captured on film by Denver-born filmmaker Patrick Dykstra, who fulfilled a long-held dream by swimming with the creatures.
The whales are the largest animal to ever inhabit the earth, and outsize even the biggest dinosaurs.
Stunning drone footage captures the enormous mammals from above, while in other shots a kayaker paddles just metres from one of the awe-inspiring creatures.
Patrick swam with the animals in the Indian Ocean off the coast of Sri Lanka, on various trips between 2009 and 2015.
The 35-year-old said: "It was a dream of mine to encounter a blue whale underwater from the time I was 16 and I saw a life sized replica of a blue whale in the Smithsonian Museum.
"I spent over a decade travelling the world in search of blue whales in clear water, from Antarctica to the Azores, and came to Sri Lanka in 2009 and found the clearest water and a large whale population.
"Nothing on earth compares to the experience of being side by side with the largest animal to ever inhabit the planet and to dive into it’s environment.
"I use my photography and videography to help study these animals in the hopes of understanding and protecting them."
Intrepid Patrick is the owner of Picture Adventure Expeditions, which gives people the opportunity to encounter some of the most amazing animals in the world.
He captured his videos while on trips with tourists and friends.
While in Sri Lanka earlier this year he shot the world's first footage of a baby blue whale suckling.