How terrible is the sea? These kinds of strange marine dangers are enough to make people afraid

"The oldest and strongest fear of mankind is the fear of the unknown." The ocean occupies 71% of the world's area, and the sea area with a depth of more than 6000 meters only accounts for 1.2% of the ocean area. However, so far, only 5% of the seabed has been explored by humans. In other words, 95% of the sea bottom is still a mystery. We have reasons to fear the unknown sea. But in fact, in addition to unknown marine life, there may be many "hidden killers" hidden in the ocean.

sea, nature, ocean, bird, seabird, seagull