Imagine a fish so desperate to survive that it takes flight above the waves, using the open air as its last line of defense.

Many years ago I watched flying-fish daily for hours on end, and I think that observations made, as were mine at that time, from the long overhang of the bow-sheaves of a cable ship are far better ...

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.

If you are still interested in flying by helicopter for a sightseeing tour, it's good to dig into each company's safety protocols, and if you're nervous, ask about their pre-flight checks ...