It was an adult blue whale, probably about 20 metres long. 'Opportunities like this with blue whales are very rare. I knew exactly the timing and distance I needed,' says Richard, 'I just had to swim ...

The heart of a blue whale can weigh up to 1,300 pounds, while its tongue can weigh 5,400 pounds, which is the average weight of an adult female elephant. Blue whales have sleek, streamlined bodies ...

She and her colleagues also filmed an Antarctic blue whale mother and ... in the last two decades. A gray whale born in 2020 is expected to reach an adult body length 1.65 metres (5ft 5in) shorter ...