Curious, but what is an “OrfesMathis?” You may have immature fish, or same-sex fish. Or they may be spawning and eating the eggs - a fishy delicacy, I hear. Do you have plants in your pond, and how deep is it? There could be fry hiding up among plants. Oh, and having plants is a good way to encourage spawning. I’ve had my pond for 6 years, have all goldfish (comets, Shubies, and a Watonai or Wakin or 2). I have NEVER witnessed spawning behavior — and I’m sure that I have a good gender mix. I HAVE HAD babies, however! In fact, this season there are about 5 fry that I’ve spotted. At first, they weren’t coming close to the surface and I never would have spotted them if I hadn’t been in the right place at the right time. They were a little bigger than a pencil. Now they are growing, and every once in a while they will venture up to the surface and try to feed with the big guys (though they’re still more timid in general, and aren’t easy to spot.)