Glass Sponge Reefs
Beneath Canada’s North Pacific waters lies a globally-unique biological treasure: glass sponge reefs. These sponge reefs are made from tiny glass spicules (needle-like skeletal elements), and were thought to have gone extinct during the Cretaceous period 145.5 to 65.5 million years ago. Scientists were very surprised when sponge reefs were discovered in Hecate Strait in 1987.
