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