Human beings can be said to be the most advanced animals in the animal kingdom. They have seven emotions and six desires. They cry when they are sad and laugh when they are excited. When men and women are passionately in love, they like to hold hands. There is also an animal in the animal kingdom that likes to hold hands when sleeping, and this animal is the smallest mammal in the ocean—the sea otter.

Sea otters are obviously the largest animals in the weasel family, but they have become popular thanks to their emojis. They were even ranked fifth on the list of the cutest animals in the world by CNN.

Not only that, they have also established a night security system. When large groups of sea otters gather together to sleep, several sea otters are also arranged to stand guard. Once an abnormality is discovered, these security guards The sea otter will use a loud voice to sound a warning to wake up these sleeping sea otters.