Zooplankton are tiny animals that feed on phytoplankton, and many zooplankton are crustaceans. Given these facts, some crustaceans feed on among the following options:
- phytoplankton
 - fungi
 - refraction of light
 - heat energy
 - an organism's body
 - carbon
 - algae
 - salt and water.


 

 phytoplankton        