Under the Sea: Extraordinary Things Discovered in the Deepest Parts of the Ocean

We’re sorry to disappoint you, but this next one is not a gentleman’s nightclub, despite its risqué-sounding name. Instead, you might be surprised to learn that this is a sea creature that belongs to the sea cucumber family. And until 2007, nobody even knew that this odd animal existed.

True to its name, this marine animal is pink. It is also entirely see-through. You can see every single part of this interesting creature’s anatomy, including its entire intestines. The pink see-through fantasia is a bioluminescent animal that can produce its own light. It’s a unique defense mechanism that it uses to warn predators away.