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