The nearest settlement to the island is the village of Moelfre, and the two are separated by a shallow channel called Y Swnt (The Strait or The Sound), which is never more than 194 metres wide and can at low tide only be waist-deep all the way across.
At extreme low Spring tides, it is possible to walk across to the island on dry ground all the way.
Due to its proximity to the mainland there are grasses found on the island and a few wild flowers.
Species of birds that can be found on the island include gulls, terns, gannets, fulmars, and Great/Arctic skuas.
A colony of seals live there and porpoises are occasionally seen also.