If you create enough explosives, you'll earn a lightning powerup that will remove one type of item from the grid when swapped. The size of the explosion depends on how large the match is, so some strategy can some into play when trying to create larger matches and deciding when to use the explosives. Matching five or more of an item will create explosive pieces that will create an explosion when swapped. Not only do you want to create matches to clear tiles and earn points, but bigger matches can create explosives that can be used to clear tiles and obstacles. You can swap an item with another item that is directly above, below, to the left, or to the right of it.

Swapping items can only be done between two items at a time, and causes them to switch positions if the swap will create a match. You must do this by swapping the items with one another. You need to match three or more of one item in a horizontal or vertical line. Your goal is to turn all the golden tiles on the grid blue by matching the items on those tiles. In Fishdom, you have a grid that is full of different types of ocean-related items such as star fish and manta rays.

Fishdom game online