Unlike every other time it has been visited, the Cosmic Serpent is actively swimming with it's fellow celestial ocean kin. Once he notices Dipper standing on the shore, though- which may be sooner than expected, given that it takes notice very quickly- she swims over, stopping when it means their head is resting in the shallows of the water. The blood seems to have been rinsed off.

Dipper will recognize the shape of her head and her main fins to be that of a nurse shark. This does not mean he does not have teeth.

Child. You seek me out. Why?