Very cool, thanks
Hi Paul. And crusty bivalves are still building reefs today, in a SW bay near you. with a little help from friends of the estuary.
http://delawareestuary.org/node/85
and the Artificial Reef Program
http://www.dnrec.delaware.gov/fw/Fisheries/Documents/2009-10%20Delaware%20reef%20guide.pdf
and a little underwater Gardening, for those with a blue thumb.
I wonder how they are doing? I think it would be fun to work or volunteer on some program like these.