Depth of the Sea

Deep diving to a depth of ten thousand meters; Long voyage, to the boundless sea. According to ocean depth data, about 90% of the world's oceans are deeper than 1000 meters, with the Mariana Trench reaching a maximum depth of approximately 10935 meters. From an Earth scale perspective, its vertical distance is not considered distant, but complex conditions such as extreme high pressure, low temperature, and darkness make deep-sea exploration difficult. A hundred years ago, humans explored the deep sea solely through bottom trawling; Nowadays, deep-sea submersibles have become the core equipment for deep-sea scientific research, assisting in the development, utilization, and protection of marine resources. *Note: This is the measured value released by the National Oceanic and Atmospheric Administration (NOAA) of the United States in 2021. The above data are authoritative reference values as of May 2026.

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About 71% of the Earth's surface is covered by oceans, with an average depth of 3800 meters, of which 95% of water bodies are hidden below 1000 meters. According to lighting and ecological characteristics, the ocean is divided into five vertical levels, and modern deep-sea exploration technology provides support for us to uncover its mysterious veil. Vertical stratification of the ocean: Five distinct layers of underwater world. Vertical stratification of the ocean is an "ecological gradient" formed by environmental factors such as light and pressure changing with depth. Each layer nurtures life adapted to extreme environments, forming a complete deep-sea ecosystem. A. Upper zone (0-200 meters): A "marine oasis" nourished by sunlight. The upper zone, also known as the translucent zone, is the only area where photosynthesis can occur. Here, the light is abundant, and phytoplankton such as diatoms and blue-green algae form the foundation of the marine food chain, nourishing organisms such as sharks and dolphins. More than 90% of marine life inhabits here, while also laying the temperature foundation for ocean circulation. B. Middle zone (200-10).