Is it true that Goldfish do not have a Stomach ?

Goldfish do not have a stomach.  The function of the stomach such as digestion and absorption of nutrients is carried out by different parts of the digestive tract.

Goldfish can thus keep eating continually.  This can generate a lot of waste which can overload the filtration system.

Goldfish need to be fed small amounts 3 or 4 times a day. Since Goldfish do not have powerful digestive capability in the absence of the stomach, Goldfish should be fed only soft foods rich in fibre.  Goldfish are very susceptible to constipation.

Is it true that Gold Fish do not have a Stomach ?

Gold Fish do not have stomachs as is technically defined.  However, different parts of the intestines of a Goldfish do the function of the stomach.

The stomach in other animals serves to store food for a while before being sent to the intestines for absorption of the nutrients.  Since, goldfish do not have stomachs, they cannot store food.  Hence, the food they eat passed through the intestines and is immediately excreted.

Hence, Goldfish should be fed in small amounts 2 or 3 times a day.