Not sure if the bug is still present, but upon breaking a board the shark is chewing on, the shark will remain stuck in its "chomping" animation. I have unfortunately yet to be able to get close enough to the shark to see if I can fix this VIA a stab or two.
that bug is still present and here is some more info from the testing I did:
1) if the shark attacks again, it will fix itself
2) reloading the game will fix it
3) if you jump in the water while the shark is in this funny animation, he will not swim to you
Thanks for reporting this, looks really funny when he is stuck in the animation though :D