The Institute for Figuring (via Craftzine) has a wild Crochet Hyperbolic Coral Reef display. They call the display a "celebration of geometry, handicraft and marine wonders." The image on the right shows crocheted "striated coral" made by Daina Taimina, with "brain corals" by Spring Pace.
The project is a collaborative one so if you want to contribute you can.
We invite crocheters everywhere to contribute models to the reef. This is a collective project and all contributors will be fully acknowledged online and in future exhibitions.