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