you could probably have 3 blue hippo tangs in there. if you want damsels, what i would do is just buy a bunch of different species and mix them up in the tank. that would be really cool. i really like damsels alot, there just so dadgum mean. you could put 3 stripe, 4 stripe, domino, blue, yellowtail, neon, yellow, etc. in there and that would be awesome. im sure you could keep 5-6 percs in there but i wouldnt put an anemone in there unless you had one for each fish because they can become really territorial over there anemones. they are just as happy without them too. later, bo