The Pyroclasmic Slooch is a slug enemy featured in Pikmin 3 where they can be found in Tropical Wilds and Distant Tundra. The Pyroclasmic Sloochs are lava colored in appearance and constantly leave a fire trail behind them when they moves.
The Pyroclasmic Slooch move around leaving its fire trail behind it and Red Pikmin must exclusively be used against it if the player want to avoid unnecessary Pikmin death. It can eat Pikmin but its tongue attack is slow and usually not a threat.
Pikmin 3 official website
These slow-moving creatures use fire to keep away potential predators. They also use their tongues to reel in prey.