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