The Second Seal
Grayson seemed to be a little anxious when he looks at his diving partner in the video. The more the seal began to bite at his hand, the more anxious he appeared to be. Fortunately, the bites don’t appear to have been excessively forceful. It appeared as though the seal was simply trying to amuse the diver by playing with him.
Allow them to exist in peace.
Grayson then made the decision to step back and let the seal do its thing. Grayson’s feet were being sniffed by the second seal, who assumed it was his turn to be noticed and began to sniff them. Perhaps he was becoming more trustworthy or desiring some attention as a result of witnessing the other seal being lavished with affection.