Barren island

The barren island is a tiny island in the Opal sea of the Pirran Caverns that lie to the east of the island of Auron and — formerly — south-east of the now non-existent Auron rafts. It is apparently without the plant life or fungus seen on the Pirran islands, and its sole inhabitants are a species of large, carnivorous grubs that feed upon sea moles who end up on the island or any travellers unaware of the danger. The island is surrounded by a broad band of bright yellow and pink seaweed planted by the Aurons as a warning against danger.