"Enough! Shut his mouth for me!" Neptune roared, cutting off the rest of Vander Decken IX's words so they would not sully his daughter's ears.
Sharks Star, the eldest prince, punched Vander Decken IX squarely in the mouth, making him shut up physically.
Shirahoshi was still utterly confused. She did not yet understand what had happened. She only watched Vander Decken IX spit out a mouthful of teeth and blood, her face filled with fear.
Taking a deep breath, Neptune waved his hand. "Drive him out. From today onward, he is forbidden from setting foot on Fish-Man Island!"
As a father, Neptune dearly wanted to smash Vander Decken IX's dog head in. But as a king, he did not wish to kill indiscriminately.
After all, though Vander Decken IX was a pervert, all he had done was send a love letter. Killing him over something so minor would be hard to justify.
So Neptune simply decided to banish him from Fish-Man Island. Out of sight, out of mind.
Unfortunately, this Neptune did not know the precise abilities of Vander Decken IX's Mark-Mark Fruit, much less that he had already learned Shirahoshi's secret. Otherwise, he would never have given such an order.
As for Otohime, she was currently fuming. She had only just gained Observation Haki capable of reading minds and was still unaccustomed to it, so she had not read Vander Decken IX's thoughts.
If she had, she definitely would not have let Vander Decken IX go.
"Damn it, bastard! Just wait! If I can't have Shirahoshi, then no one can!"
Doflamingo withdrew the Observation Haki he had used to sense Vander Decken IX, but he did not warn them. He had his own plans for Shirahoshi, Poseidon.
Raising her as in the original story would be a terrible waste