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