- polysaprobic
- "Of, designating, or inhabiting an aquatic environment that is poor in dissolved oxygen and contains much chemically reducing decayed organic matter", 1920s. From poly- + saprobic, after German polysaprob; compare mesosaprobic, oligosaprobic.
- oligosaprobic
- "Of, designating, or inhabiting an aquatic environment that is rich in dissolved oxygen and (relatively) free from decayed organic matter", 1920s. From oligo- + saprobic, after German Oligosaprob.