Beautiful, elegant, great for something to add movement. These will sting any coral nearby so be sure to give plenty of room. My Jawfish had his burrow behind this piece at one point and had sting marks all on one side from rubbing against this all day. It got all puffy then looked sick/closed up one day for some random reason but I dipped it a few times and it has made a full recovery. I guess one thing to look for if they are sick they will not open and may pull away from their skeleton.