For Reasons Unknown

Around the bend
Is where the head.
Reluctant,
Maybe because of the water,
With green scum on top.
Maybe because of the jellyfish,
Lurking in the depths.
They leap from rock to rock,
And then back onto the sand,
Under a fallen tree.
They hesitate,
Then turn back.
Maybe because of the wall of rocks,
Maybe because the path halts,
Or maybe for reasons unknown.