One episode of the 2001 PBS Series The Shape of Life, titled "The Ultimate Animal" examined echinoderms. I was intrigued to learn that scientists had thought of starfish and other echinoderms as mindless eating machines crawling along without any awareness of their surroundings. Time-lapse photography revealed that they interacted with each other, even competing over territory--all of it happening, from our perspective, very slowly.
This was really lovely and reminded me of that.
Also I love it when the camera doesn't remain stationary in time-lapse photography.