to swim after dark

We spotted the fin of a great white shark
As it slowly cruised near the kelp and seals
Then decided not to swim after dark.

Twas not sheer fear, but a spine-chilling spark
We did not pretend, were back on our heels.
 We spotted the fin of a Great White Shark

An east borne wind became a warming ark,
We weighed the pain that sun-burned skin reveals
Then decided... not to swim after dark.

The first quick thrust turned and slanted the mark
The seal herd went still; as gulls wait for meals
We spotted the fin of a great white shark

 The grip of the moment was grim and stark
In silence, watched one of nature’s ordeals
Then decided. Not to swim after dark,

Not On a dare, or any foolish lark
To risk crossed-stardom on some viral reels.
We spotted the fin of a Great White Shark
Then decided not to swim... after dark.