Voracious Eaters

I had more than 10 bettas in my pond as most fishes did not survive.  So bettas or fighting fish as they are better known as are far tougher and tolerant of poor water condition like dissolved oxygen or toxic water. 


When I put in a bag of goldfishes, all my bettas died.  I checked with the aquarium shop and he says they should be tolerant of each other.  I also noticed they co-exist well.  So I think it must be goldfishes are voracious eaters and my bettas died of hunger after a few days as the goldfishes must have eaten up all the food.


I can see the goldfish are always foraging for food whereas the bettas are quiet.