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