We are talking with SEMARNAT / SAGARPA about the idea of creating some offshore reefs out here in our 100 square km zone where we hold several permits, including the entire San Martin island where we also hold the federal concession. I personally like your idea but they have a very short list of approved materials right now and concrete seems to be their favorite. Definitely works but the weight:volume factor adds some serious logistical hurdles that end up making it quite an expensive venture. We are looking at some of the lighter materials they have used elsewhere successfully and will be submitting those ideas to see how they respond...Well, here is an idea that hasn't got any interest at all, but I really feel could possibly remedy the situation. Focus all of your efforts towards ecology! That is, find and alien yourselves with the most influential, powerful and outspoken Mexican "Save the Planet/Wildlife" organization in Mexico City and jointly apply for a grant to establish offshore reefs for sea life preservation. Simply, the program would be to purchase all the of the junk yard cars, trucks and buses in the San Quintin valley (remove environmental hazards such as the oil, transmission fluids, etc.) and haul them out on a barge to the seiner's favorite spots and strategically position and create a bunch of reefs. If I were a seiner and consistently kept netting Volkswagens, I would move on. Done deal!