Multi-response: You're welcome. While anthills are a work of art, or rather an art of work, I hate fire ants. I have a pair of sixlines that spawn every evening before lights out. They're pretty, but can be a little mean towards other fish. The last three firefish I bought jumped out of the tank. I still have the original two that I bought 1 1/2 years ago, and they aren't jumpers. A covered tank is highly recommended just to be safe. Ditto on the anthills, to a certain extent... note prior response. The Coral Beauty is considered the safest for reef tanks, thus the name. I've never seen mine nipping at any corals, though I caught him looking at some red gorgonian polyps a couple of times. I lost a small colony of metallic green zoas, but my theory is the rock boring urchin ate them. Just a hunch...