Huntington Artificial Reef


rock reef
A hopper barge full of rock

All manner of concrete, steel, and stone rubble from dredging, demolition projects, and other construction is used as artificial reef materials. This material is generally available at very low cost or free from construction companies who are more than happy to get rid of it. Transportation costs determine where this material is used by the Reef Program.


An invertebrate is any multicellular animal lacking a backbone. This includes all animal phyla other than Chordata. The major invertebrate phyla include:

  • Sponges - Porifera
  • Coelenterates - Cnidaria
  • Ctenophores - Ctenophora
  • Echinoderms - Echinodermata
  • Flatworms - Platyhelminthes
  • Roundworms - Nematoda
  • Segmented worms - Annelida
  • Mollusks - Mollusca
  • Arthropods - Arthropoda

Invertebrates are tremendously diverse, ranging from microscopic wormlike mezozoans to huge animals such as the giant squid. Approximately 95% of all the earth's animal species are invertebrates; of these, the vast majority are insects and other arthropods. Invertebrates are important as parasites and are essential elements of all ecological communities.

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