Orbicella annularis, or the boulder star coral, is a type of reef building coral that lives in the Caribbean Sea. As the individual coral polyps fuse their calcium carbonate skeletons together, they create beautiful lobed colonies. Boulder star corals are extremely important to reef ecology. The meandering, intricate structure of each coral colony provide habitat necessary for a variety of marine life. O. annularis also acts as a nursery to shelter young fish. The large structures formed by boulder star corals even prevent coastal erosion by absorbing storm waves. Unfortunately, O. annularis is an endangered species. These corals are threatened by pollution, fisheries, and rising ocean temperatures.
This beaded crochet piece features a colony of boulder star coral polyps accompanied by an assortment of crochet sea sponges. I decided to crochet the coral using textured green wool to create the irregular, undulated surface reminiscent of boulder star corals at home in the Caribbean. On top of this base, I used sage green thread to embroider delicate, flower-like polyps amongst the wool lobes. At the center of each little polyp is a variety of golden glass beads to highlight individual coral animals. The clusters of white and beige sea sponges represent one example of how Orbicella annularis supports biodiversity by providing habitat.