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