I just heard on a new t.v show called Tanks that goldfish don't have stomach's and so we should feed them small amt's a few times a day. Never new that.
oh queen of the net searching...........here is what I found:
Goldfish do not have a stomach. Food is absorbed as it travels through their intestines so it must have a high alkaline content.
Goldfish are massive waste producers - even those tiny ones! Goldfish have no stomachs, so basically what they eat goes out. This fouls the water very quickly!
Goldfish are unusual in that they lack a stomach at the start of the digestive tract where food can be stored, so they need to eat small quantities of food on a frequent basis. Offering them a large amount of food just once a day will therefore be wasteful, and will also lead to a deterioration in water quality as the unwanted food breaks down and pollutes the water. Instead , give them a small amount of food four or five times a day, which will meet their appetite.
Then of course there are other posts about stomachs, gf getting air in the stomachs, stomach swelling on and on lol