Here’s a fascinating fish fact:

[Yumi]

The parrotfish is known for its unique ability to produce mucus that forms a protective cocoon around itself while it sleeps. This cocoon helps to mask its scent from predators, making it less likely to be detected while it rests.

 

[Tomoyo Chan]

What? That's unbelievable! I didn't know parrotfish could do that. I wonder if it's the only fish with that kind of ability.