Darwin had a fish named Very Brighte
‘Twas marked with spots of orange amongst the white
Such a fine example of selective breed'n
'Twould be a shame to see him eat'n.

Charles D., taught this very special fish
To take a walk on a contrivance; called a leash.
On days when weather was good and fair
Brighte was released from his leather snare.

Under trees so green and supple, the two
Frolicked, as only friends could do.
One day they took a different path
As they were deep in thought, discussing math.

They approached a glen so inviting
The fish dictating, Darwin writing.
There in the cooling shade,
A brook's babbling sound was made.

‘Memberances of times in distant past
Thru his brain the pictures flashed.
Caused him (the fish, not Darwin)
To leap right in.

‘Twas here, the poor fish did discover
A truth known to father, mother, sister, brother.
Pollywogs, as well, have found it's true,
One cannot go home to waters, blue.

As he sank into the deep,
Poor Darwin's fish began to weep.
Sink or Swim, he did remember.
But forgot all else, that day in September.

Perhaps he forgot how to swim and drowned.
Yet his body was never found.
But Darwin was convinced that it was evolution,
That brough Brighte's life to its conclusion.

Sidi J. Mahtrow

http://www.poemhunter.com/poem/darwin-s-fish/