Moment giant fin whale's huge mouth engulfs thousands of gallons of water

This is the moment the planet's second largest living creature opens its giant jaws and swallows thousands of gallons of water during feeding.
The fin whale was filmed by videographer Rhys Morgan off the Pembrokeshire coast in Wales, and it shows the mammal's expandable pleats take in up to 18,000 gallons of water and krill.
Morgan said "it was complete luck" that he captured the whale feeding and swimming with dolphins on his drone while fishing with a friend.
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