Otter paw print in my beer

Otter Beer is one of the best beers in the world which is why it is served in the best pub in the world, the estimable Dolphin. The other night I was buying a couple of pints for me and my beloved when I saw to my amazement, there was the imprint of an otter’s paw in my Otter beer!

I only had my phone, so it is not a great photo, but I am sure you will be able to make it out. Do you think it is a miracle? Should I ring the Pope?