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