These five facts will make you fall even more in love with Sea Otters

Sea Otters are one of the cutest animals on the planet.

Here are some of facts that will make you fall in love with them all over again.

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1. They are the ultimate definition of relationship goals. Sea Otters hold hands so they don't drift apart while they sleep, but if there is no friend on hand, they use kelp as a blanket to anchor themselves.

2. They have the world's thickest fur. Sea Otters have the thickest fur out of all mammals with about 1 million hairs per square inch. This comes in handy because they are the only marine animal to not have a layer of blubber

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3. They are impressive. Sea Otters can swim up to six miles per hour and hold their breaths for up to four minutes. They use these skills to dive as deep as 330 feet beneath the surface.

4. They are the biggest weasel ever. Sea Otters are the largest member of the weasel family, weighing up to 100 lbs.

5. They are a part of the Harry Potter world. J.K. Rowling's favorite animal is an otter. She even made Hermione's patronus an otter.

While these facts only prove how amazing they are, these cuddly creatures are endangered.

They were nearly hunted to extinction back in the 1700s and 1800s, and while the population has recovered, the number one threat to sea otters today are oil spills caused by humans.

Help save our furry friends -- they are obviously too cute and cool to miss out on.

RELATED: See more adorable sea otters photos below