OceanDeep Sea
There are lakes at the bottom of the ocean.
Brine so dense it will not mix has its own shoreline, its own waves, and it kills what swims in.
Source
This fact is written from the English Wikipedia article it links to, so you can check every word in one tap. Fact Drop rates that source 4 out of 5 for credibility, and the rating travels with the fact on the back of its card in the app.
More ocean facts
Ocean facts from a place we have mapped less thoroughly than Mars. A male anglerfish merges with his mate for good, there are lakes at the bottom of the ocean, and below about 8,400 metres there are no fish at all. Each fact links to its source.
- A male anglerfish merges with his mate. Permanently.
- The giant squid has the largest eye of any animal.
- There are seafloor springs at 400°C that do not boil.
- The barreleye fish has a transparent dome for a forehead.
- Below 8,400 metres, there are no fish. There can't be.
- A dead whale feeds the seafloor for fifty years.