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Pictures of kittens and puppies make the Internet go round, but the Twitter feed of Japan’s Hirakawa Zoo has another variety of tiny creatures that could make it go into overdrive — baby otters.

The Asian small-clawed otters, both boys, were born on March 2 this year.

This one raising the roof shows that they already know how to party.

But like all other babies, they do get tired pretty easily.

They opened their eyes about two weeks ago before turning a month old a few days later, and have apparently gotten a lot heavier (well, in baby-otter terms at least).

And in case you were wondering what they sound like, the zoo has very graciously uploaded an adorable video as well.

Head over to the Hirakawa Zoo’s Twitter page for photos of other exotic cuties, like red pandas. Kittens are so yesterday.

Read next: Watch Live Video of the Newborn Giraffe at the Dallas Zoo

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Write to Rishi Iyengar at rishi.iyengar@timeasia.com.

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