When you stare into the abyss, the abyss stares into you. Our understanding of the deep ocean is far less than our understanding of the moon.
On the surface, it's because of the overwhelming and unavoidable water pressure. Perhaps the real underlying reason comes from humans' instinctive fear of the dark abyss.
heard about it
"Blue hole"? I have seen something that is only one foot long but can scare even whales.
"Sabertooth Shark"? Ugly, ferocious alien-like creatures
What about the "Bobbitt Worm"? There are also giant groupers that like to attack people,
"Will-o'-the-wisp jellyfish", giant
"Mantis shrimp", underwater ancient ruins, transnational maritime criminal organizations, the most mysterious lake in the world, the underground sea left over from the Cretaceous, the underwater dragon palace in the Beibu Gulf... If you have a curious and adventurous heart, let the protagonist Ling Hao will take you into a blue and deep mysterious world to explore.