[There's a soft 'Hm as he slinks shoulder deep into the not so lava hot water. His love of sushi kept him away from seeking information on zoonotic diseases involving fish - no need to add unnecessary stress while he ate from a conveyor belt.]

Nothing that isn't obvious. Disease from consuming old fish come to mind - a problem we may have if the fish rain doesn't stop. I wonder how long it will take for those in town to start serving us rotting meat.

[The wall a boring sight - he starts to envision fish the steam that bubbles across it. A stupid activity for his brain to focus on, but better than sinking into a void of the off-white barrier.]

Though in saying that, you should worry about yourself in all these matters, Vash. You may not have the same problems as humans, but it's almost irrelevant in this world. Our captor can do whatever they want and exploit any part of you using the means available to them. With fish, lava or otherwise.

[Isn't that great?????? He doesn't even sound mad - the water acting like a weighted blanket around his wrath. Calm, relaxed and content, despite the words out of his mouth. He slinks a bit deeper - that sweet, sweet heat stroke vibe something he's seeking.]

That reminds me - I have a question for you. I know where Maruki-san stands on the matter, but what's your plan in this place?