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