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