THEY are the largest turtles on the planet and have iconic status - but they're not normally spotted in Scotland.

Ocean observers had a "once in a lifetime moment" at the weekend when a leatherback turtle emerged just meters from their boat off the Inner Hebrides.

The species, found in both the Pacific and Atlantic, is seldom seen in Scotland but was swimming 15 miles west of the Inner Hebridean isle of Muck.

The encounter happened during an expedition by the Hebridean Whale and Dolphin Trust, which was collecting scientific data on the sealife in the area.

Scotland’s west coast seas are globally important habitats for cetaceans - whales, dolphins and porpoises - but sightings of turtles are much rarer, with just one other encounter with a leatherback turtle in over 17 years.

None of the crew had ever seen a turtle in the UK before this one "popped up" 100 metres away from their vessel.

The National:

Marine biodiversity officer Becky Dudley said: "It was truly a once in a lifetime moment for all of us on board.

"The turtle did not seem to be in much of a hurry to go anywhere and we floated alongside the animal as it swam over towards, using its colossal front flippers to propel itself forward with ease.

"It was enormous! We could see the whole animal under the water as it glided along, taking periodic breaths, before disappearing beneath the waves.

"I have been sailing around the Hebrides, year-round, for over two years now. This has to be one of the most magical and surprising encounters so far, and one I will never forget."

Leatherback turtles reach up to 2.5 meters in length and breed in tropical waters.

They visit more temperate zones to feed on jellyfish and other soft-bodied sea creatures.

The Trust said: "Although this sighting is rare, leather back turtles should feel right at home in Scottish waters as they have unique set of adaptations, including change in blood flow and a thick layer of fat, that allow them to have internal control over their body temperature.

"This means that they are able to forage in temperatures lower than 5˚celcius.

"However, they do not come ashore on beaches in the UK, so if you see one of these turtles on land please inform British Divers Marine Life Rescue."