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