Protists and aquatic organisms
Virtually all aquatic organisms depend directly or indirectly on protists for food.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Ecology of Protists. October 16, 2013."
http://cnx.org/content/m44619/latest/Figure_23_04_02abcde.jpg
OpenStax CNX
CC BY 3.0.
