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