Mouro Island is a small, uninhabited island in the Bay of Biscay. The only structure on the island is a 19th century lighthouse, which was occupied by two lighthouse keepers up until 1921. Due to the lighthouse often being isolated by large storms, the work for the lighthouse keepers was very dangerous, with at least three workers having been killed on the island. Due to these dangers, the lighthouse is now automated.
The water surrounding the island has a high biodiversity of fish and marine animals, and was declared a marine reserve in 1986. The island is also an important home for a number of bird species, including European Storm Petrels, and European Herring Gulls.
