A Lecture On The Psychology of Animals Swallowed Alive
From 1925
[Darwin] states that big sharks swallow the porcupine. fish, and has frequently found it floating alive and distended in the stomach of a shark. On one occasion a porcupine fish swallowed by a shark had eaten its way out, not only through the coats of the stomach, but through the walls of tlhe body, and thus destroyed its captor.
Darwin asks, Who would ever have imaginied that a little soft fish could have destroyed the great and savage shark? The diodon iniflates itself with air and water, which it expels with some force when it deflates. The jets of water must cause some curious ticklings to a shark with a lively diodoni in its stomach!