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