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