Um, these creatures look like tiny underwater hippos, and we have so many questions

Aquarium of the Pacific has some tiny underwater hippos, and we have so many questions.

What are they??<

WHY are they??

Are they related to hippos?

https://www.youtube.com/watch?v=H0QRJzG3szM?feature=oembed

Where are they from?

Are they cuddly?

https://www.youtube.com/watch?v=51jB8YljliM?feature=oembed

When and why do they change colors?

https://www.instagram.com/p/3ZUf2Bk5lI

They use their lower arms to walk along the sea floor while waving the wide protective membranes on their arms to advertise their poisonous nature.

So, when they’re at their cutest, they’re also at their deadliest.