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