Anoxic water aren't actually that rare and exist in a lot of freshwater systems (lakes, marshes, etc.) to one degree or another. The range of depths in the Bla

Anoxic water aren't actually that rare and exist in a lot of freshwater systems (lakes, marshes, etc.) to one degree or another. The range of depths in the Black see is impressive but there are others that are comparable. [1] [1] https://en.wikipedia.org/wiki/Anoxic_waters#Anoxic_basins https://en.wikipedia.org/wiki/Anoxic_waters#Anoxic_basins