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