Manx shearwaters, and red-throated divers.

Around 800 km2 of the waters around Rùm, Canna and the low-lying rocky islet of Oigh-sgeir have been designated as the Small Isles Nature Conservation Marine Protected Area (NCMPA). Of particular note is that this area holds the UK's only known colony of fan mussels. The seas surrounding all of the Small Isles have also been designated as a SAC due