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