#Simon de Lestang

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Each year between November and February, more than 10 million crays journey to waters between Geraldton and Shark Bay, where they settle on reefs. Dr de Lestang said the crayfish use the Earth's magnetism to spin in the same direction for the migration. "They all walk out at pretty much the exact same angle, 283 degrees, using magnetic reckoning, until they hit the deeper waters around about 100 to 200 metres," he said. "And once they get into that loop and current, they turn and walk into the current and they walk northwards." Dr de Lestang said lobsters tapped into magnetic forces in much the same way as homing pigeons. "They can sense the magnetic fields underwater, and they can use that to know which direction they are going," he said.

‘WA crayfish are about to turn in unison and head for deeper waters on 'whites run'’, ABC