In this episode we investigate some holes in the sand on a beach in Ka-Zulu Natal... we set up a camera, waited... and sure enough a ghost crab popped out! Watch right to the end to see what happened ...

"Will they stay in Hong Kong waters, or head to the South China Sea? Divers have seen them in Sai Kung and Tuen Mun. We need to systematically map the health and daily range of released crabs." ...