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