What’s this jaw-dropping curiosity?

Last week’s curiosity was a jellyfish. Jellyfish have existed for at least 500 million years, making them the oldest multi-organ animal. They vary widely in size, some being as small as 1mm high or as big as 2 metres!

Now here’s this week’s curiosity – On my visit to Whitby I came across this jaw dropping curiosity. What could it be? Look at the size of the bones and pick up on the clue I’ve given you in the title before you guess.