Blastoids were a type of echinoderm (relative to starfish and sea urchins) that lived on the bottom of the ancient ocean’s floors. The were close relatives to the crinoids and, like them, relied on filter feeding. Unlike crinoids, Blastoids went extinct at the end of the Permian period due to the ecologic fallout from extreme climate change.
Blastoids were a type of echinoderm (relative to starfish and sea urchins) that lived on the bottom of the ancient ocean’s floors. The were close relatives to the crinoids and, like them, relied on filter feeding. Unlike crinoids, Blastoids went extinct at the end of the Permian period due to the ecologic fallout from extreme climate change.