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