Deep-sea fish study reveals evolutionary marvels in Earth’s hadal zone

The deep sea, covering approximately 65% of Earth’s surface, has long been considered a biological desert. In this extreme environment—particularly in the hadal zone at depths greater than 6,000 meters—organisms endure immense pressures exceeding 1 ton per square centimeter, near-freezing temperatures, low oxygen levels, and constant darkness. The deep sea, covering approximately 65% of Earth’s surface, has long been considered a biological desert. In this extreme environment—particularly in the hadal zone at depths greater than 6,000 meters—organisms endure immense pressures exceeding 1 ton per square centimeter, near-freezing temperatures, low oxygen levels, and constant darkness. Evolution Ecology Phys.org – latest science and technology news stories