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