I'm finally getting round to the photos (other than iPhone pictures) of our trip - sorry if you're already tired of hearing about it.
Our trip to the National Seashore on the Atlantic side of the Cape had the excitement of a sign about great white sharks. The warning: don't swim with seals. Our experience: seals everywhere just off the beach (but very nice to see).
We also saw cormorants, but no sharks.
We were probably in more danger when I decided to catch a huge crab in a small net on bay side of the island. After we'd looked at it, I tried to let it go but one of its barbed legs was caught in the net. I tried to free it with my fingers, it tried to cut itself free with its large claws. Eventually, it left me to untangle it without too much fear of losing a finger and it immediately buried itself in the sand. We saw several of these crabs do that - they are extremely efficient, just reversing in without more than a small vibration visible.
Even more amazing was to see a live horsehoe crab buried in the sand - no danger from that or the sea snails leaving impressive trails in the beds of the shallow pools.
Know what else is wild? How far the tide goes out there. Here's a picture from when we arrived a couple of hours after high tide followed by two from around low tide.
The middle one is looking back towards the beach pictured in the first one - and we were nowhere near as far out as we could have gone!