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