Aesop for Children (1919)
93. THE FOX AND THE CRAB
A Crab one day grew disgusted with the sands in which he lived. He decided to take a stroll to the meadow not far inland. There he would find better fare than briny water and sand mites. So off he crawled to the meadow. But there a hungry Fox spied him, and in a twinkling, ate him up, both shell and claw.
Be content with your lot.
Aesop for Children (translator not identified), 1919. Illustrations by Milo Winter (1886-1956). Available online at Project Gutenberg.