In 1996 the Isles of Scilly was designated a European Marine Site and the Marine Management Organisation is required to monitor the site at least every six years. The grey seal ("Halichoerus grypus") is a named species and surveys were carried out in 2005 and 2010. Annet is one of the top four sites within the islands for numbers of seals and, during August to December 2010, over half of the observed pups seen were on Annet (46 out of 85). Records of some of the rarer cetaceans are from strandings and the British Museum was the first organisation to publish such reports for Britain. Strandings are often the only indication that rare species live, or pass through, an area and in 1917 an endangered species, a male fin whale ("Balaenoptera physalus") was washed up.