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