You reminded me of when I lived on the Florida gulf coast...25 years ago...
There was a certain time of the year the locals called "the jubillee'. It was some kind of mating season when crabs crawled up on the beach by the thousands.
The locals would take a big pot and a pack of matches to the beach, scoop up a pot full of water, gather up some driftwood and build a fire and set the pot of water on to boil.
Then they would walk down the beach and pick up blue crabs and go back and toss them in the pot. When they turned red and floated to the top they were 'done'.
They would eat their fill, dump the pot of water on the fire to put it out, and go back home.
22 pounds of shells?
That's like 'nothing'.