Fish Tank is a splicable background which was added on September 11, 2015 during the Fishin' Pack Update. 10 of them can also be obtained from the said pack for 10,000 gems. It is used to store fish which may be inserted or removed via a Fish Tank Port.
- If the graphic settings are lowered, the fish may become invisible.
- Fish Tanks are commonly referred to by players as "ftanks".