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About: Sponge reef     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatFisheries, within Data Space : dbpedia.org associated with source document(s)

Type: Thingyago:Fishery103350880yago:GeographicPoint108578706yago:Location100027167yago:Object100002684yago:PhysicalEntity100001930yago:Point108620061yago:Workplace104602044yago:YagoGeoEntityyago:YagoLegalActorGeoyago:YagoPermanentlyLocatedEntityyago:WikicatFisheries New Facet based on Instances of this Class

Sponge reefs are reefs formed by Hexactinellid sponges, which have a skeleton made of silica, and are often referred to as glass sponges. Such reefs are now very rare, and found only in waters off the coast of British Columbia, Washington and southern Alaska. Recently sponge reefs were identified within the strait of Georgia and Howe sound close to Vancouver. Although common in the late Jurassic period, reef-building sponges were believed to have gone extinct during or shortly after the Cretaceous period, until the existing reefs were discovered Queen Charlotte sound in 1987–1988 – hence these sometimes being dubbed living fossils.