Children like to keep fish as a hobby

Many children like to keep cats and dogs at home as pets. However their parents will usually refuse, because a lot of effort is required to take care of these pets. The other option for the child is to keep a low maintenance pet
Turtles are fairly low maintenance, they are not easy to find.
Fish also require less care compared to cats and dogs, however they are likely to die quickly.
Goldfish and guppies are considered to be the best pets for children.

Prices of ornamental fish vary in some fish stores

It is observed that the price of fish greatly varies from store to store. In some stores, they are keeping the price of the fish almost the same for a year or more, in other stores, the price of the fish varies weekly depending on the stock of fish available.
Most of the smaller fish sellers are keeping the price of their fish like goldfish, tetras, clownfish, angel fish almost the same at Rs 50 a pair. However larger pet stores, which are mainly selling dog food, are charging more money and their prices will vary.
For example a month ago, the price of platys at a store was Rs 50 a pair, and now the prices of the platys increased to Rs 80 a pair. So it is advisable to purchase the fish when they are cheap

Why Goldfish are the most popular pet fish

Goldfish are popular pet fish because they can be trained like other pets. For example when the pet owner will enter the room, the gold fish in the bowl are immediately detecting that the pet owner has come to the room, and are frantically asking for food . This is in contrast to other types of fish like Koi, Fighter Betta Fish which are largely passive and do not react when there is any movement or noise in the room where the fish bowl is located
The goldfish are also easy to keep fish as they as they remain alive for a relatively long period of time without much maintenance or care, in contrast to other fish like Koi, Guppies which are dying quite quickly
So though expensive at Rs 150 a pair, gold fish are highly recommended as pet fish