substrate substratethe surface or medium on which an organism lives or grows, or the material on the bottom of the ocean. Related Articles: Glossary: essential fish habitat (EFH)Underwater Sound and Coral Reef Restoration – September 14, 2022Considerations for “Contained” Studies in Laboratory or Captive SettingsWhat components of sound are used for hearing?Sea Urchin (Kina)Potential effects of sound on marine invertebratesMedia BackgrounderTutorial: Wind TurbineWind TurbineGhost crab (Ocypode spp.) Chris Knowlton2019-09-10T09:41:25-05:00