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.