Jelly Fish Clouds

I spotted these unusual clouds all in a neat line early yesterday morning.  So after a little online searching I found out that they are Altocumulus Castellanus clouds but the more user friendly nickname is Jelly Fish clouds.  I also learned that there are people who are considered to be cloud experts and they are Nephologists.  Want to know about the rare cloud formations above the Treasure Valley yesterday?  http://www.weather.com/news/jellyfish-clouds-20130924