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I am pretty sure they survive in both the surface zone and the Deep zone.
so it can absorb the sun
Diatoms are among the most common microbial eukaryotes and dominate in many different aquatic and marine habitats
It floats or connects to rocks by the surface.
They live in Fresh ,Brackish, and Sea Water.
It always depends on the shark, so both, basically.
There are both freshwater and saltwater diatoms.
Flying fish live close to the surface of the water. This is because they use the waves to increase their mobility through the water.
close to the surface
deep
in deep deep water
Deep water