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