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