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