Sonia got me into these guys about 2 years ago when we bought this fish:
This is a very interesting species. They are Mbuna from Lake Malawi. Their rounded, underslung "noses" are specially adapted mouthparts that they use to scrape algae and microorganisms off of the surface of rocks.
Click here to see which species are currently growing out
Here's a picture of the same fish (Hakone) munching on algae on a rock.
