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