The object of the game is to solve puzzles and earn coins to set up and decorate a virtual aquarium.

Each of the rounds takes place on a different grid and poses a challenge to earn golden tiles by matching gems at least once over each one.

When three or more objects are matched simultaneously, one of the bonuses appears: firecrackers, depth bombs, dynamite charges, or lightning.

[5][8] The platform also provides mini-games, holiday-themed upgrades, pearl tournament challenges, and a 3D-simulation of a scuba mask which allows the user to dive into the deep sea.

[15] According to the analytics of Sensor Tower, Fishdom was a top game in the category Puzzle&Decorate with around 15.6 million downloads in 2020.