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