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