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