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