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