Car Alarm Jellyfish
Here is a short clip showing the species of jellyfish that was used to trap the famous Giant Squid last week. When the Car Alarm Jellyfish is being attacked, he changes to the color blue and starts flashing, hoping another predator will attack his predator. Alas, that was not the case in this rather chilling video.
http://richardqiu.wordpress.com/2011/11/30/atolla-wyvillei-alarm-jellyfish/