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