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