It is one of more than 20 species of land crab on the island. With more than 150 million red crabs on Christmas Island, their annual migration from the interior of the remote island to the coast ...

“The red crab, endemic to Christmas Island, is the most abundant of the more than 20 species of land crab on the Island ... The red crab migration period is also a busy season for volunteers ...

"So it's seldom noticed by locals that a blue crab migration has even happened ... One of more than 20 species of land crab on the island, the blues grow larger than the more well-known red ...