Love it !!
As a child I grew up next to the sea and would regularly go down at low tide to collect 'supper'. You learnt early on what shellfish to avoid. If a mussel didn't close when you approached, or a limpet came off the rocks too easily, you left them well alone.
The best was collecting rasor clams. You'd walk the beach looking for their air holes, sprinkle a little salt in, then grab the clam when it came up having mistaken the salt for the incoming tide.
As I got older I learnt how to catch the spider crabs that hid in the rocks at low tide. Those would be boiled in a large pot on the beach before being taken back to the house to eat.
I don't often get to visit a beach nowadays but still can't resist a forage when I do.