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