Best Deepest
The Congo River, a major waterway of Central Africa, flows into the Atlantic Ocean. It’s notable for being the world's deepest river, boasting depths exceeding 220 meters and holding the second highest volume of water discharged globally. The river is vital for transportation and commerce within the...
Pseudoliparis swirei is a remarkable deep-sea snailfish inhabiting the hadal zone of the world’s oceans. This liparid fish was discovered in the Mariana Trench and holds the record for the deepest confirmed fish species, surviving pressures exceeding 8,000 meters. Its unique physiology allows it to...
Why this score?
Named hadal depth record holder with major scientific coverage and clear iconic status among trench fishes.
Scoring methodology
The Mariana snailfish is a deep-sea fish inhabiting the hadal zone of trenches like the Mariana Trench. It’s notable for its remarkable ability to survive immense pressures exceeding 7,000 meters. Scientists study this liparid species to understand adaptations to extreme environments and the physiol...
Why this score?
Mariana Trench depth adaptation and research prominence give strong expert and media standing.
Scoring methodology
Dragon Hole, also known as the Yongle Blue Hole, is a large marine blue hole located in the Paracel Islands area of the South China Sea. It was surveyed in 2016 and measured at approximately 300 meters in depth, making it the deepest known marine blue hole at the time of its measurement. Blue holes...
