it makes the water more acidic.
it makes the water saltier.
it kills large predators like sharks.
All plankton are microscopic (too small to see without a microscope).
Just for fun
To attract a mate
To scare away predators
To see in the dark
microscopic
plants
aquatic (water-living)
drifting or wandering
prokaryotes
algae
zooplankton
the ocean
phytoplankton
eukaryotes
Zooplankton are tiny animals.
A few dozen cells
Thousands of cells
Millions of cells
Hundreds of cells