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