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