[Gon wants to say "it's a secret!" as he holds onto the boy's tail tightly, determined not to let him go. This was the first time he'd gotten to touch it, so he's amazed at how real it is. How flexible and powerful it is, just like a real fish.

Just when he thinks he's caught the pretty mermaid, his dizzy head tells him he needs to swim. Now. Gon loses control of his Nen as he starts bolting for the top of the tank, swimming much slower than before because he's panicking, realizing they went down a really long way when they were playing.]