Hundreds of cells
A few dozen cells
Thousands of cells
Millions of cells
Zooplankton are tiny animals.
eukaryotes
prokaryotes
zooplankton
phytoplankton
plants
aquatic (water-living)
drifting or wandering
microscopic
algae
the ocean
it makes the water saltier.
it makes the water more acidic.
it kills large predators like sharks.
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