I was at the LFS and spied a most gorgeous sea slug! I asked what kind it was and was given the general name of Purple Nudibranch... the store couldn't really tell me what it ate or much of anything about it... I was a little disappointed that they would get an animal they didn't know how to care for but it's not my store is it? I did some looking and found two that species that seemed to be it. As far as i can tell it eats sponges... I'd really like to get some good facts about them as a possible way to keep them in my aquarium. However, from what information i can seem to gather the general consensus is that these creatures shouldn't be kept because of lack of nutritional information and short life span. In some cases i've read that they may also eat anemones so i'm not sure about the reef safety. Any input? http://www.nudipixel.net/species/risbecia_apolegma/ http://www.nudipixel.net/species/hypselodoris_bullockii/ The ones at the store were colored almost exactly like the first link but had a much more similar coloration diffusion like the second. It looked exactly like this except it had a white bottom (foot?) instead of a purple one.