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