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