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