 When you get plastic bottles on the beaches, the coconut islands, like lots of these islands, are covered in crabs. There's huge numbers of hermit crabs there, and hermit crabs are the ones that swap their shells. And there's all kinds of different hermit crabs. There's little tiny ones, there's great big ones that walk around with coconut shells on themselves. But the hermit crabs will climb into plastic bottles and climb into plastic containers. And if the container is angled downwards, they can get out again.