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