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Macrobenthos consists of the organisms that live at the bottom of a water column[1] and are visible to the naked eye.[2] In some classification schemes, these organisms are larger than 1 mm;[1] in another, the smallest dimension must be at least 0.5 mm.[3] They include polychaete worms, pelecypods, anthozoans, echinoderms, sponges, ascidians, crustaceans.

A visual examination of macroorganisms at the bottom of an aquatic ecosystem can be a good indicator of water quality.[4]


  1. ^ a b J.S. Link, C.A. Griswold, E.T. Methratta, J. Gunnard, Editors. 2006. Documentation for the Energy Modeling and Analysis eXercise (EMAX). United States Department of Commerce, Northeast Fisheries Science Center. Reference Document 06-15 Chapter 8.
  2. ^ "Macrobenthos definition". Mondofacto. 9 Oct 1997. Retrieved 2011-01-26. 
  3. ^ "Macrobenthos definition". Retrieved 2011-01-26. 
  4. ^ Mulligan CN, Fukue M and Sato Y (2010) Sediments Contamination and Sustainable Remediation page 30, CRC Press. ISBN 9781420062236.