Between 40 and 50 million red crabs live on Christmas Island
The migration takes place during the wet season
Crabs' journey to the ocean is not easy
Once adult, a red crab's carapace is 40 mm big
Christmas Island's beautiful landscape
The mating
Migration begins some weeks before spawning dates
A new born crab on Christmas Island
Eggs need to be dropped in the ocean on spring tides
Baby crabs
Crabs need seven days to reach the seaside
A road sign warns people about crabs' migration