Do Fish Have To Drink?

[andywg]

Fresh water fish have a lower salt concentration than their sourroundings and so are constantly passing water out at the gills to maintain their internal salt levels.

I think you made a mistake, dpn't freshwater fish have a igher concentration of salt?

Indeed they do, typo there

 

[Nirvanna]

wow that was a very interesting thread...i learn a lot of things which I didn't know before...