The Second Seal
Grayson appears to be anxious as he stares at his diving buddy in the footage. The more the seal bit his hand, the more anxious he appeared. Fortunately, the bites do not appear to be aggressive. The seal appeared to be amusing himself by playing with the diver.
Let Them Be
Grayson then decided to step back and let the seal do its thing. Meanwhile, the second seal decided it was his turn to be noticed and began sniffing at Grayson’s feet. Perhaps he was getting more trusting or desirous of attention after witnessing the other seal being lavished with affection.