microscopic
plants
aquatic (water-living)
drifting or wandering
zooplankton
phytoplankton
prokaryotes
eukaryotes
Thousands of cells
Hundreds of cells
A few dozen cells
Millions of cells
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.
To scare away predators
Just for fun
To see in the dark
To attract a mate
algae
the ocean
Zooplankton are tiny animals.