Whales Have a Little Known Secret...And It's Absolutely Amazing
Whales are majestic, mysterious creatures that populate the Earth’s seas and oceans. Whales are famous for being largest mammal on earth, with the blue whale quite probably the largest animal. They also nurse their young with milk, are insulated with blubber layers and enjoy a good old sing song with one another.
Add to that list creating rainbows? These whale rainbows (or whalebows, as we are now calling them) are formed when the creatures breach the water to breathe. It’s just as glorious as it sounds.
Whales hold their breath underwater (as they are mammals, just like us)
So when they surface to breathe, they need to exhale.
When they do, the create an explosion of vapor, causing a rainbow.