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