Fish are the cheapest and easiest to keep pets, they do not require much maintenance, investment and easily adjust to their new surroundings. Fish cost varies from Rs 50 a pair to Rs 150 a pair for most common varieties of fish. Larger fish like the oscar fish and shark can cost as much as Rs 3000 a fish .
As soon as the fish are put in a new vessel, they will be active and eat all the food which is being supplied. However some fish like koi, guppies can die rather quickly due to unknown reasons and float in the water.
The fish sellers say that change in water could be the cause of the fish death. In other cases fish are just disappearing from the fish bowl where they are being kept. The reason where the missing fish have gone is not known, they may be eaten by the other fish.