in water and aquatic animals become myopic (near-sighted) in air. In some fish, this gain or loss of lens power amounts to as much as 20 to 30 dioptres 1.

These days, depending on your location, it could be marked with a fish secretly pinned to someone’s back or a whoopee cushion or even news reports of flying penguins (yes, that actually happened ...

These days, depending on your location, it could be marked with a fish secretly pinned to someone's back or a whoopee cushion or even news reports of flying penguins (yes, that actually happened).