They sold seashells by the seashore
Sand and surf, who could ask for more
At the end of the day their work is done
Time to rest and watch the sun
Pondering some tasty seafood to eat
But they wound up as the tasty crab's meat.
One wouldn't normally find the subject of kids being devoured by land crabs as funny, but I think that dark humor has its place. Besides, this picture can't possibly be taken seriously; has anyone ever seen a crab the size of a dump truck?