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