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Christmas Island Red Crab

Gecarcoidea natalis

NT — Near Threatened

Description

Famous for their spectacular annual migration when 50 million crabs march from forest to sea to spawn, turning roads and beaches red.

CategoryMarine

Size11.6 cm carapace

Population~50 million (declining from 130M)

HabitatRainforest floor (inland, migrates to coast)

Range

Christmas Island, Indian Ocean

Threats

Invasive yellow crazy antsHabitat lossClimate change

💡

During their annual spawning migration, Christmas Island builds special crab bridges and tunnels under roads — traffic stops for weeks!

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