The Plunger Colony is one of the many harvestables that can be found on the island of Matumada. They are typically found by itself on objects and plant life found throughout the fields of Matumada and the Upper Island.
The Plunger Colony is formed by a stack of globby creatures of various blue and green hues, each possessing various speckles on the sides of its body. As its name implies, it forms a colony in the shape of a plunger. Besides that, not much can be said about its overall appearance.
It is possible for players to exchange Plunger Colonies for rewards while searching for items to complete Giant Toad's Tasks if the task card is currently active. Other than that, it can be sold to a selling vendor at a selling price of 25,000 gold.