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