Card Trivia:Tree Otter
- This card has a counterpart: "Sea Koala".
- Both cards are named for the same pair of animals, the koala and sea otter.
- Their Japanese names are based on a portmanteau of "koala" and "rakko" (Japanese for "sea otter"), while their English names are based on each animal inhabiting the other's environment.
- Both cards are hybrid creatures based on their namesakes; this monster is an otter with koala-like traits, reflecting the portmanteau used for its Japanese name that has the word for "otter" first.
- Both cards have effects that alter the ATK of monsters on the field and require you to control another Beast monster in order to activate it.
- Both cards are Fusion Material for the Fusion Monster "Koalo-Koala".
- Both cards are named for the same pair of animals, the koala and sea otter.
