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