I have a yellow watchman goby (very cool fish), red firefish ( just beautiful) and one blue/green chromis, blue legged coral banded shrimp (personality), one very large turbo snail, one algae eating cowrie snail, one nerite snail. No crabs though. Tons of huge mushrooms, toadstool leather, open red brain, green star polyps, green putton polyps. Tank is 4 years old.......