It's a phenomenon, known documentary producer David Attenborough describes as one of the world's amazing natural wonders, it only happens once a year, and it is unique to Australian waters.
But today anyone will see that millions of red crabs take over the coast of Christmas Island online after Google flew into specialized cameras to capture it.
The technology giant joined Parker Australia to film the annual migration and casting of 45 million red crabs in December and will now publish virtual reality tours of the event.
Christmas Island, also known as "Australia's Galapagos", has a host of wildlife, including more than 100 bird species and unusual terrain, including blowholes .
However, it is difficult to reach travelers with only two business flights in and out each week.
Using Google technology, virtual visitors will now be able to inspect many areas on the island, look around the picturesque Dolly Beach and see the red crabs that creep on the island's Ethel Beach ramp for example.
The crabs that can only be found on Christmas Island, come out of the woods every year to release their eggs on its coasts.
Such is the size of their migration, the crabs are on the road on the island's roads, and Parks Australia has built barriers and bridges to help them reach the coast safely.
Julesøen resident Dr Alasdair Grigg from Parks Australia, Google's Street View Trekker camera to capture the event carefully trampled around the eight-legged crustaceans.
"I think it's amazing that people can now have a virtual experience of these places," he said.
"I hope the imagery inspires people to protect these natural wonders and fragile island ecosystems around the world."
Google's Virtual Christmas Tour follows its efforts to capture walks on Uluru and Kata Tjuta National Park last year where CEO Jas on Pellegrino said the company was lecturing to produce virtual tours of several Australian landmarks and tourist destinations.