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