I was thumbing through a book at a bookstore while my fiance shopped. The book was on micro/pico reefs. I didn't buy it, but there was a tiny species of dartfish, max size about 1.5 inches, light purple/pink, reccomended for sub 5G reefs. I should have written down the species name, but we didn't go straight home as planned, and I've forgotten it. Any ideas? I'll probably go find that book again, but maybe someone knows.