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