About 15 years ago, scientists from the Geological Survey of Canada were astonished to discover vast reefs, formed by colonies of hexactinellid glass sponges, growing deep in the Queen Charlotte ...
Calyptrella tenuissima, a glass sponge fossil that died on the seabed 80 million years ago Coeloptychium agaricoides, a hexactinellid (six rayed spiculed) fossil sponge originating from the Cretaceous ...
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