We were lucky enough to be able to see this amazing crochet coral reef during a visit to Manchester Museum. Its part of Coral Something Rich and Strange. I left wanting to make my own but I am not sure my tiny terraced house would have space for a coral reef. I have found some links in case anyone else feels inspired. Unfortunately I have been too busy to make any yet but if you do please share your pictures as I would love to see how they come out! Patterns here and here, some more photos and ideas here.