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