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