Read about Turing patterns (which violate the principle of entropy here).
And this brings me to the concept of Mendelbrot's fractals, which are found all over nature. They are infinitely repetitive. Each corner and curve is repeated down to infinity. Here is a video. Notice that each time the camera zooms, the same pattern appears. Another anti-entropic concept.
And that one reminds me of this blast from the past:
THING I WANT: barnacle storage pods.