The ocean is shrouded in mystery. It covers about 71% of the Earth’s surface, yet we know very little about it when you consider how vast it is. In fact, it is estimated that at least 80% of the ocean has never been mapped, explored or seen by any humans. So what is lurking out there? We’ll never know everything, but one online group is dedicated to featuring all of the creepy, beautiful and fascinating creatures that are living deep down in the sea.