When the player gets too close, the Sulfur Plant quickly opens up like a flower, revealing the Crashfish inside. If the player continues to approach, the Crashfish will charge the player. Once the plant is empty, the player can harvest the Cave Sulfur inside.
If left undisturbed, the Sulfur Plant will spawn a new Crashfish in the next 15-20 minutes, which could be prevented by destroying it by using the knife. However, once the plant is destroyed, its powder is no longer harvestable.
Data Bank Entry
These plants appear to serve as nests for the explosive organisms which guard them.