algae
zooplankton
the ocean
prokaryotes
Zooplankton are tiny animals.
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).
drifting or wandering
microscopic
plants
aquatic (water-living)
A few dozen cells
Millions of cells
Hundreds of cells
Thousands of cells
it makes the water more acidic.
it makes the water saltier.
it kills large predators like sharks.
eukaryotes
phytoplankton