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