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