The HAZMAT Unit members wear white suits with a light green tinted visor and tall white boots. They have red tanks on their backs. In "Pineapple Invasion" and "Jolly Lodgers," they have visible eyes, while their eyes are not visible in their first two appearances.
Role in series
He appears to remove the toxic material that was sold in the Kelpshake restaurants.
They appear when Squidward calls them in order for them to send exterminators to condemn the hotel so he could get out of the situation with the jellyfishing convention, even though there was no danger actually happening.