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