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