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