American poet Marianne Moore (1887 - 1972) was an avid naturalist. Many of her works were inspired by the natural world and the various animals that we share this planet with - including jellyfish:
“Visible, invisible,
A fluctuating charm,
An amber-colored amethyst
Inhabits it; your arm
Approaches, and
It opens and
It closes;
You have meant
To catch it,
And it shrivels;
You abandon
Your intent—
It opens, and it
Closes and you
Reach for it—
The blue
Surrounding it
Grows cloudy, and
It floats away
From you.”
"A Jelly-Fish" has been reproduced here under the Public Domain licence.