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