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