I have had my silver arrowana for nearly 3 years, I have fed him mice on a regular basis, goldfish, trout, bass, and earthworms, I recently fed him a duckling. All of these seem like food that an arrowana might cross paths with in the wild. I have not had any problems with him not eating other than pellet food, he will not have anything to do with any that i have tried. The previous owner fed him worms, convicts, and goldfish his whole life, he got him at about 5" when i got him he was 20". Any thoughts on the nutritional value of mice, ducks, worms, and various other living creatures. I would guess that the mice and ducks are low in fat, the gold fish(which he eats most of the time) may not be the best choice as i read in another thread due to a high fat content, but that was talking about marine fish, would the same apply to a freshwater fish, is high fat content food harmful? I think too much of one food could be a problem so i break it up i feed him fish for about two weeks, then a mouse, or bird or something. Let me know what you think.