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