Mammals and sea life are often misidentified when they are washed up on shorelines. Take for example the many strange lifeforms that have been found washed up along the shoreline of New York. One of the more well known ones was called the Montauk Monster (pictured below)
What at first appears to be a four legged creature with a beak like mouth is in reality a decomposing land mammal. There is evidence of fur on one of the legs. The creature also has teeth and not a beak. The animal has hand like paws which resemble a raccoon and not a dog as many people originally thought. The face had been either eaten away or got caught in something which may or may not have resulted in the animals death.
The bottom line is.... a picture is not always the best way to identify an unidentified creature. An autopsy or DNA test should be done to determine the what the creature truly is.