By total hair count:
* Alpaca: Alpaca fleece is incredibly dense, with an estimated 60,000-80,000 fibers per square inch!
* Angora rabbit: Angora rabbits are bred for their exceptionally long, soft fur. While they don't have as many fibers per inch as alpacas, they have a lot of hair overall due to their length.
By hair density:
* Alpaca: Again, alpacas win here with their incredibly dense fleece.
* Polar bear: While their fur isn't as dense as an alpaca's, their fur is extremely thick and provides exceptional insulation.
By "hairiness" as a subjective feeling:
* Giant anteater: The Giant Anteater's fur is long, coarse, and covers its entire body, giving it a very hairy appearance.
* Yaks: Yaks are covered in thick, long hair that makes them look incredibly hairy.
* Orangutan: While their fur is relatively sparse, it's long and covers their entire body, creating a very hairy impression.
Ultimately, the "most hairy" animal is subjective. It depends on what criteria you consider most important: number of hairs, hair density, length of hair, or even visual impression.