No worries mike,
I suggested the same thing to my buddy, but he insisted the water was too rough and murky from the storms for divers, and he didn't see the 'glow' in the water that divers tend to make.
The only seals I know with opposable thumbs are in Coronado, and they're way to busy for this kind of nonsense

.
I think Doug is right, the net was likely dragged and scooped up some rocks.
Just wondered if anyone has ever pulled up rocks before.
Willy