Zanoits

Zanoits are a type of microscopic organism. Each year, they kill off hundreds of thousands of Plantoids, which produce mellotoxins that would otherwise do them in. They are mentioned in "Ricardio the Heart Guy," when Ricardio discusses them with Princess Bubblegum. Finn and Jake are poisoned with them by Ricardio in "Lady & Peebles". One noticable symptom of ingesting it is sleepiness.