Layers of pink & purple foam craft sheets. Maybe some white acrylic paint for speckles and texture.
Coral Reef off Little Cayman Island
Corals are marine invertebrates in the class Anthozoa of phylum Cnidaria. They typically live in compact colonies of many identical individual polyps. The group includes the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton. A coral "group" is a colony of myriad genetically identical polyps. Each polyp is a sac-like animal typically only a few millimeters in diameter and a few centimeters in length. A set of tentacles surround a…
Colorful red finger sponge and brown tube sponges on Belize reef - stock photo