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