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