[Gon pushes his fingers deeper only to be blocked by something on its way out. Humming in interest, Gon lifts his hand and lets the new appendage fully extend out of his slit.]

Woah, fish don't have these! It must be a mermaid thing..

[He wraps his hand around the pink tentacle-like appendage, pumping it up and down.]

Your new body's full of surprises, isn't it?