Toxic Dumple

The Toxic Dumple is an aquatic grub-dog and a relative of the Water Dumple. They move slower than Water Dumples and excrete a short-lasting trail of poison gas as they advance towards their prey. Because they are usually found in water, the gas they emit will be a problem for Blue Pikmin as it pollutes the water. Leaders are useful for killing Toxic Dumples that are in water because they aren't usually worth the trouble of killing with Pikmin.

In Pikmin: Global Breakdown
In Pikmin: Global Breakdown, the Toxic Dumple has adapted to the harsh breakdown by becoming twice as fast as the Pikmin: Sinister Incinerator version and leaving a trail of poison that only disappears after it is defeated.

Pikspore
PS undefined In Pikspore, Toxic Dumples act just like their Pikmin: Sinister Incinerator counterpart.

Pikmin: The After Years
In Pikmin: The After Years, they act like identically to Water Dumples except for leaving a trail of poison in their wake.