Otter
The otter has achieved significant cultural penetration, appearing in countless wildlife documentaries and generating approximately 47% of all wholesome internet content, according to the Oxford Digital Media Assessment Unit. Otter-themed merchandise generates an estimated 280 million pounds annually, and the phrase 'otterly adorable' has been used so frequently that linguists have stopped objecting to it. They have become ambassadors for river conservation, a role they perform simply by existing photogenically.
Spongebob
SpongeBob SquarePants represents one of the most economically successful animated properties in television history, generating over thirteen billion dollars in merchandise and licensing. The Birmingham School of Media Economics notes that his face has appeared on more products than most Renaissance artists produced paintings. He has influenced multiple generations, spawned countless memes, and his theme song can be recalled by approximately 94% of people born after 1995, whether they wish to or not.
VERDICT
The industrial scale of SpongeBob's cultural infiltration simply cannot be matched by any real animal. When a cartoon sponge has generated more revenue than the GDP of several small nations, one must acknowledge commercial supremacy.