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