I found these here by the Hospital they are used in the cement and barricades. I think they just scoop up what ever they can right out of the ocean and use it to build with; there is more coral than anything and literally tons of it. I have some good pieces of that and will show them some other time. I was amazed that these weren't destroyed like most all the others that I have seen. There are little surprises all over here. So Jen agreed that when the Target comes here that we would retire here and live amungst teh shells. It won't be too long since they now have two in Alaska!