One of the many great things about Shetland is it's wildlife; we've seen puffins, porpoises, gannets, seals, the lawn is covered in oystercatchers, terns have dive bombed us, as have skuas, and there have been a lot of otters. More particularly there's been a lot of one otter who has reliably appeared between tides and at dusk. It looks to me like a young female, she has a distinctive pink patch on her nose and is a joy to watch.
Shetland is a brilliant place to spot otters - walk by the shore keeping an eye out for spraint, empty crab shells and sea urchins; likely otter food. Ideally if you spot one hope you find yourself upwind and not silhouetted against the sky - their eyesight is poor so they rely on their sense of smell. If this is the case stay still and they might not notice you. I spent a good 45 minutes watching my otter yesterday before she got downwind of me and swam off. As I was in an undignified as well as uncomfortable position I wasn't altogether sorry to be able to move, but hadn't wanted to disturb the important otter business of eating and fluffing up fur.