"Blue Anemone."

q phia, CC BY 2.0 via Flickr: https://flic.kr/p/kZcfcB

"Marine" by James Hamilton Hay (1897), Public domain, via Wikimedia Commons. Color edits.

Life reconstruction of Zenaspis pagei. (Interesting to see the third-eye and crescent shape head.)

Nobu Tamura email:nobu.tamura@yahoo.com https://spinops.blogspot.com/ https://paleoexhibit.blogspot.com/, CC BY-SA 4.0, via Wikimedia Commons.