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