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 ...
Source: Reddit Glass Sponges are the oldest living creatures in the world. Glass sponges (Hexactinellida) are deep-sea animals with silica-based, glass-like spicules forming intricate skeletons.
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