by Halli S
This tessellation shows translational (slide) symmetry.
The "tile" (tile = repeating shape) is very neatly, precisely reproduced and fits with all the other tiles perfectly, without gaps or overlaps. That's what a proper tessellation does.
However, even though this is reeeeeallly good, even Halli admits her gorillas have only 3 out of 4 legs. Could she go back and make the gorilla shape even better?