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