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