West Mouse is an islet

Islet

An islet is a very small island.- Types :As suggested by its origin as islette, an Old French diminutive of "isle", use of the term implies small size, but little attention is given to drawing an upper limit on its applicability....

 lying 1.1 kilometre (0.683510010314787 mi) off the north-east coast of Anglesey

Anglesey

Anglesey , also known by its Welsh name Ynys Môn , is an island and, as Isle of Anglesey, a county off the north west coast of Wales...

, Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

. Its maximum dimensions are 92 by, with an area of 1.2 acres (4,856.2 m²).

It is located in an area of notoriously strong tide

Tide

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the moon and the sun and the rotation of the Earth....

s. Because of this, at least three shipwreck

Shipwreck

A shipwreck is what remains of a ship that has wrecked, either sunk or beached. Whatever the cause, a sunken ship or a wrecked ship is a physical example of the event: this explains why the two concepts are often overlapping in English....

s lie near it, making it a popular diving

Diving

Diving is the sport of jumping or falling into water from a platform or springboard, sometimes while performing acrobatics. Diving is an internationally-recognized sport that is part of the Olympic Games. In addition, unstructured and non-competitive diving is a recreational pastime.Diving is one...

 location. There is now a white beacon on the island which is used as a navigational aid if lined up with two other beacons, one on the Anglesey mainland and another on Coal Rock, an islet a mile and a half north. The area also host to species such as hornwrack, sea squirts and conger eels. The island is part of a set of three spread out along the north coast of Anglesey. The other two islands are East Mouse

East Mouse

East Mouse is an islet found off the north coast of Anglesey, Wales. It is found just a few hundred metres away from the town of Amlwch. For this reason the island is known in Welsh as Ynys Amlwch, Amlwch Island. The islet is tiny with a maximum area of only , and void of any significant flora...

 and Middle Mouse

Middle Mouse

Middle Mouse is an uninhabited island situated 1 kilometre off the north coast of Anglesey. It is notable as the northernmost point of Wales. The island measures a maximum of 207 metres by 110 metres, with a maximum area of 3.7 acres and has a maximum altitude of 16 metres above sea level...

.