I recently watched a T.V. show that had some guy who gets samples from these creatures that wash ashore. He does DNA testing on them to determine their origin.
He said he eventually gets a sample of everything including that infamous Nessy look-a-like creature that was caught in a net a while back.
And that everything has been classified as known animals. Most of them being the remains of whales.
According to him. None of them are unknown creatures.
.........No periods have been harmed in the creation of this message.