An octopus is filmed dragging a crab to its death in Western Australia. The octopus emerges from a rock pool in Yallingup, south of Perth, and pulls the unfortunate crustacean into the pool. While it's rare for octopuses to be filmed on land, it is not unusual for intertidal octopuses to roam between rockpools in the search for food – and this could be the first time one has been filmed hunting on land. As they breathe through gills, they cannot stay out of water for long