I have my five half-grown angelfish in an 80gal tank. There's some live as well as artificial plants, and they share it with two bnp's, three male guppies, and a young (about 8 inches long) bgk. Everyone seems to be doing fine together. There are two electric blue marble veiltails, 2 blue glitter wide fins (I think), and one blue pinoy veiltail. In the last couple weeks, I've noticed the the two blue marbles consistently hang out together, as do the two glitter wide fins. The blue pinoy seems to just hang out in between, and is pretty much ignored by both. The two 'sets' bicker a little if they get close to each other (they do't seem to be defending territories), but nothing serious. So is this maybe the beginning of pairing off and I just got lucky, or do angels have a preference for like-colored fish?