I'm pretty sure that my two angelfish have eaten the two small ottos I had. The angelfish are juveniles, growing rapidly. I had two small ottos in the tank and they have disappeared. At first I figured that they were just hiding somewhere in the tank, but when vaccuming today, I lifted everything and still found no ottos. I know that they didn't spontaneously combust, so I assume they were eaten by my two angels. The thing is, I was told not to put anything that can fit into their mouths in the tank with them, but the angels aren't that big. They aren't adults by any means, but they are a lot bigger than when I originally purchased them. When I first added the ottos, the angels harassed them a bit, but then seemed to have forgotten them. Now I'm afraid of adding any other fish. The two angels get along perfectly, but they are pretty aggressive. Am I not feeding them enough? They always look like they are foraging for food. I feed them about a small pinch a day. My tank is 55 gallons, so I know it can support more than two angelfish. Are there any fish you can reccommend that may be compatible with my angels? They really are partners in crime... absolutely inseperable.