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