The following is a message I got today on Facebook. You really should read this book.

I read the unnatural history of the sea you advised. It's seriously changed my life. The fish I eat, the things I do, buy and the causes I support. Also I think I'm a better and more appreciative diver. Great advice. I salute you. 
I've since past the book on and bought 2 more.

The Unnatural History of the Sea book cover

The physical book from Book Depository

Amazon link