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