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