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