What is crazy is that I would bet that picture doesn't even do the real colors justice. I was listening to an NPR clip about how life evolved color and how blue is very hard for vertebrate life to mimic. I guess most animals 'fake' blue and don't actually produce blue pigment but instead bend light to do it or mix pigments to achieve the look.
Yeah, they can move. This is a bit of a longer video, but if you skip to about 5:10 or so, you can see a full grown one on the move. It happened to come straight at me multiple times. It was a 5 ft blue blur. I had to drop the camera in order to deal with the situation, which involved hooking it as it darted towards me. Each time I managed to hook it and move it away, it ended up coming straight at me again. This happened 3 times in about 15 secs. As I was wearing sandals, it was an intense 15 secs!