How do fishmen produce water when there is no water around?


I was watching the fight between Luffy and Hody, when Hody tries to use the
attack where he shoots water bullets (I think it's called Yabusame).

So I was wondering how he can produce so much water when there is no water
around him? Is that some quality of the fishmen or am I missing something?  

Here's the image from the fight.

![enter image description here](https://i.stack.imgur.com/qoQTr.png)




As state on
[wiki](http://onepiece.wikia.com/wiki/Hody_Jones#Abilities_and_Powers), Hody's
body under the influence of Energy Steroids can produce water, so he can make
a drip of water even when he wasn't soaked

> After overdosing on Energy Steroids, Hody appeared to drip with water even
> though he wasn't soaked, suggesting that he'd been secreting it.

So I think it's just like sweat, but with greater amount of water




As state on
[wiki](http://onepiece.wikia.com/wiki/Hody_Jones#Abilities_and_Powers), Hody's
body under the influence of Energy Steroids can produce water, so he can make
a drip of water even when he wasn't soaked

> After overdosing on Energy Steroids, Hody appeared to drip with water even
> though he wasn't soaked, suggesting that he'd been secreting it.

So I think it's just like sweat, but with greater amount of water

