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