一百年前,人们对深海里的一切只是推测。大概是由于深海的环境恶劣,氧气不足、光照不够,压力还大,深海下的生命可能并不多,因为这些条件会令我们知道的那些海洋生物望而却步。19世纪的时候,许多科学家还曾断言,海面500米以下绝不会有生命存在。但是,到了20世纪,当我们有能力进行深海探测后,却在深海海底发现了一个与我们预想中完全不同的、生机勃勃的世界。人们看到,深海里存在着各种各样的生物,深海中层,海下400到700米的地方,那里的鱼类数量甚至是原 Hundreds of years ago, everything was inferred in the deep sea. Probably due to the harsh environment in the deep sea, lack of oxygen, inadequate light and heavy pressure, the life under deep sea may not be much because these conditions will deter the marine life we ​​know. In the 19th century, many scientists also asserted that life would never exist under 500 meters above sea level. However, by the 20th century, when we were able to conduct deep-sea exploration, we found a completely different and vibrant world beneath the deep ocean. People see there are all kinds of creatures in the depths, the middle of the deep sea, 400 to 700 meters below sea level, where the number of fish or even the original