Sclerobiont

Sclerobionts are collectively known as organisms living in or on any kind of hard substrate (Taylor and Wilson, 2003). A few examples of sclerobionts include Entobia borings, Gastrochaenolites borings, Talpina borings, serpulids, encrusting oysters, encrusting foraminiferans, Stomatopora bryozoans, and "Berenicea" bryozoans.

• 
  Entobia sponge borings and the cyclostome bryozoan Voigtopora thurni on an oyster valve from the Coon Creek Beds of the Ripley Formation (Upper Cretaceous) near Blue Springs, Mississippi.
• 
  Another example of Entobia sponge borings and encrusting serpulid worms on a modern shell of the bivalve Mercenaria in North Carolina.
• 
  Thecideide brachiopod (T), sabellid worm tube (S) and bryozoans (B) on the shell of the bivalve Ctenostreon from the Upper Jurassic of Poland.
• 
  Serpulid worms enrusting Pecten; Duck Harbor Beach on Cape Cod Bay, Wellfleet, Massachusetts.
• 
  Chesapecten, barnacles and sponge borings (Entobia) from the Pliocene of York River, Virginia, USA.