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