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