Actually, a more in-depth explanation can be found many miles away, when a venerable scientist known as Dr. Vegapunk was busy overseeing the results of his latest devil-fruit research.

"So it didn't work out then?"

"No sir!" said the lab technician. "All of our cross-species spliced devil-fruit suddenly failed biologically. Their insides uh... melted, sir."

"Ah," said the famous doctor. "I do hope that pesky pirate who stole one of our spliced results was foolish enough to eat it then. It would have been such an interesting experiment."

Dr. Kusanagi,

Kindly test if damage to the controller produces the same effect. If this is the case we may have to revisit our implant design.

Exercise caution when dealing with existing at-risk subjects. Those with carnivorous zoan fruits are particularly dangerous and not be allowed enter the state.

Any corpses of zoan-type subjects should be incinerated immediately on expiration.

Once your testing is done, send out advisory warnings to all other parties any of our fixed zoans might have been sent to. This includes the Tenryuubito owner of the recently purchased X-10. Regards,

Dr. Vegapunk