This is a good study of a male Eider duck if I do say so myself, but what might surprise is that it was taken at the Penguin pool at Whipsnade zoo, high on the escarpment of the Dunstable Downs and a long way from the coast! As the RSPB will tell you, this is the UK's largest duck and a true seaduck that spends its time out on the waves of the ocean. Except for when it's mixing it with the penguins well inland apparently!
That head is sheer 30s art deco if you ask me - a seriously designer duck! Here's another angle, though it's a shame I didn't get any pictures with the penguins in as well, so you'll just have to believe me.