Freshwater fish don’t drink, and saltwater fish, on the other hand, do. So if some fish drink and other fish don’t, we’re left with an obvious question: Do fish pee?
Freshwater fish don’t drink, and saltwater fish, on the other hand, do. So if some fish drink and other fish don’t, we’re left with an obvious question: Do fish pee?
ScienceSwitch 
I have always pondered this! Should I paint a peeing fish next time I make a painting?
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It would be quite a peculiarity, but fun nonetheless .. 😀
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