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