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