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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