Otters are some of the most delightful animals on the planet.

These long, lean, furry creatures embody pure joy in so many ways:
What other species builds water slides for fun?
Or holds hands with their friends just because?
Or wraps themselves in seaweed so they can nap without floating away?
These intelligent, water-dwelling mammals are not only an essential part of the world's ecosystem (not to mention YouTube's ecosystem), but they have a lot to teach us about the way we live life.