Koi goldfish mask 

Tropical reef

Brightly colored fish, turtles, seahorses and dancing jellyfish on white fabric.   The reverse is identical

Butterflies

Many different species of butterflies.
How many can an you identify?
The reverse is identical

Fish on black

Ocean fish swim among the waves.   Reverse is water blue (shown below)

Sleepy cats nap among books and teacups.   Reverses to blue/green (shows right)

Napping cats & books

Library cats]

Dragonflies on blue

Dragonflies on black

Colorful fish

Dragonflies on black