They are one of my favorite shrimp, the one I have I collected in HI in nov of 2006. I collected a pair, but the male didn't survive the trip back to my home in FL. There is a photo of her in my gallary, the pic with the longnose b/f in the upper right corner. I collect stars for her and a star lasts about 7-10 days, she has a preference for linkia (the pair was eating a linkia type when I found them) but if I can't find them or if I can't dive (weather or work or whatever) I've used serpents and chocolate chip in the past. the chocolate chips last about the same, 7-10 days, but serpents seem to fall apart in just a few days so I try not to use them unless it is a last resort. I recommend them if you can get over the food issue, they take no substitute and to some hobbyiests this is hard to handle.
Good luck