Diodon antennatus,
The porcupine fish (as Diodon antennatus) is mentioned in Charles Darwin's famous account of his trip around the world The Voyage of the Beagle. He noted how the fish can swim quite fine when inflated even though the altered buoyancy requires it to do so upside down. Darwin also mentioned hearing from fellow naturalist "Dr. Allen of Forres, that he has frequently found a Diodon, floating alive and distended, in the stomach of the shark; and that on several occasions he has known it eat its way, not only through the coats of the stomach, but through the sides of the monster" (Voyage 14)
