Glass sponge reefs are unique to the coast of British Columbia, Canada. They represent a living window into the past where prehistoric sponge reefs (now extinct) once dominated the Jurassic, but disappeared after the Cretaceous.
Today, sponge reefs create habitat for a diverse community of other animals, several of which are commercially important (crustaceans and fish).
Unfortunately, these reefs are not federally protected as marine protected areas. Some reefs, 9000-years old, could potentially be destroyed by fishing activity that frequently occurs on the Pacific coast of Canada.
Video compilation credit: Jackson W.F. Chu
Video Sources Courtesy of Sally Leys / CSSF-ROPOS
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For more on the biology, ecology, and science of glass sponge reefs:
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