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