Surely nothing can swim without water?
Well surely you could swim in any kind of liquid? Tea, turpentine, melted ice cream, liquid methane, tomato sauce? Although you might not want to ;)
Tomato sauce? Eehh, sounds like it's not gonna be very liquidy.
Some people say that fairyflies seem to swim in air
Waiter, there's a fish in my soup!
is it a proverb ? Like ‘man cannot live on bread alone’ ?