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