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