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