a semicolon and the end of a fish

Pigs don't fly, they say -
But I've seen fish that do
Flying fish run across, flitting away -
Neon purple wings and fairy feathers
Sundays on to Saturdays and on once again
Tuesdays have always been full
Of promises of grand lunches -
To forget the profundity and then the profanity;
That ensued; time flew by - standing
By the fence, forty percent
On this side - with no room for a period
A full stop was only a possibility -
But not a hope - a semicolon has always stood
In between - separating parts -
Indicating pauses longer than a coma -
With one missing m, the state
Of prolonged forgetfulness, but shorter - than
A period at least seven years long - as
The dictionaries say and try to explain -
Fish fly and on to the other side
Of the sky, where flying fish are no miracles
With no periods and no stops that are full
There on the other side remain till the end
Are only a semicolon and the end of a fish