Exploring Beautiful Glass Sponge Reef | Nautilus Live
How to Add Sponges to a Reef Tank
Rare glass sponge reefs found off B.C. coast
Glass Sponge Reefs - The Basics
Sea Sponge Facts: 10 facts about Sea Sponges
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 on the western Canadian continental shelf. Although common in the late Jurassic period, sponge reefs were believed to have gone extinct during or shortly after the Cretaceous period, until the existing reefs were discovered in 1987–1988 - hence these sometimes being dubbed living fossils.
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