Scroll coral

This is the inspector gadget of the coral world. It can change shape (in deeper calm water it will spread out but in shallow subtidal water it will become convoluted like a scroll), it can remove and regrow its skin, it has an assortment of different algae to use in different conditions and it can change how it gets energy, extending its tentacles (go-go gadget arms) to catch more food when the light is too strong or not strong enough.
Ocean Free.