These are time-lapse photography captured by youtube user ozguncyprus. The first video shows a bubble coral inflating from from its skeleton into the recognizable appearance that gives it its namesake.
An amazing Ricordea sp. does a mesmerizing throbbing dance as it erupts to life.
It’s difficult to appreciate zoanthids “blooming” in real time, but time-lapse really brings the process to life.
Another zoanthid “flowering” for good measure:
A finger leather takes on its tree-like form.