Ocho is a blue octopus who travels around the country with the Addamses in their mansion-shaped RV. Unlike Aristotle, who always remained at least partially in his aquarium, Ocho frequently walks on the ground with his tentacles.
Ocho appears in all sixteen episodes of this series.
- In the original series, Pugsley has an octopus named Aristotle.
- In the 2019 animated film, Wednesday has a pet octopus named Socrates.