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