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