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