This is a piece of symmetry art done by Dr. David,
the original webmaster of www.Tessellations.org
BUT... is it a tessellation?
mouse cursor on the green box below to see
Webmaster Sethness's opinion.
There are gaps-- large unused spaces-- in the art.
Look between the front paw of any cat and the nearest tail. Look above each ear, too.
Do you see a large unused space? I do.
The "tiles" in a tessellation should fit together with
only a thin constant line between them, like a jigsaw puzzle's pieces.
Below, I've changed the gaps to green so they're easy to see. A proper tessellation would have no gaps.