Cleaners is the sixteenth episode of Season Four.
- Next Episode: Pirates
- Previous Episode: Weird Weapons
Rank[]
- Number 10. Sloth - They are the world's least efficient cleaners.
- Number 9. Fly - They constantly scrub their bodies to keep themselves clean.
- Number 8. Pig - They cover themselves in mud so when it dries, it cleans their skin.
- Number 7. Dung Beetle - They bury nearly one ton of dung per hectare per year.
- Number 6. Oxpecker - They remove ticks from the bodies of large mammals.
- Number 5. Yellow-Bellied Sea Snake - They tie themselves in knots to dislodge parasites.
- Number 4. Sponge - They keep themselves clean with highly toxic cleaning compounds.
- Number 3. Ant - They have a pair of glands loaded with cleaning fluids.
- Number 2. Cleaner Shrimp - They can clean fish by feeding on parasites and dead tissue.
- Number 1. Japanese Macaque - Cleaning is the social glue that binds the troop together.