Hello! Yes, in Nanaue's case, since he is obviously oblivious to the situation, he can make this attempted crossing. He will land outside Portam Hall. Some might scatter while others may seem annoyed that their place in line has been disrupted by a shark.

Due to the Free Cities's heavy bureaucracy, they will take down his name, official statement, and territory of residence before sending him back. They will also attempt to fill out his description as best they can. The scribe will appear very unsure how to notate his hair color.

You may reply to this comment with his official statement if you wish. It will be formally entered into their records.