OTTO THE OTTER by Evelyn
Here's a beautiful piece of symmetry art. The curling line in the water is a particularly nice bit of stylishness.
This is not the ideal example of an Escher-style tessellation, though. Can you see why? It's the water.
Water has no form, and we can call it "background", so it's a kind of gap. Tessellations should be made of shapes that repeat to
fill a space without gaps or overlaps.
Now, here's something tricky to explain: If it were not a picture of animals and waves, then this would be a fine example of abstract-style tessellation.
Why? Because we wouldn't interpret those "water" areas as water, so we wouldn't think of them as gaps where the foreground animals let the background water show through.
Instead, we'd think of them as part of the repeating solid abstract shape.