Endurance Exploration Group Inc (EXPL)

[hedge_fun]

This article mentions EXPL and others. Interesting that Odyssey Marine is looking at a different business model....underwater.

The company once pinpointed nearly 10,000 shipwrecks under the water but determined only about 100 likely had sufficient riches aboard to make an expensive salvage worth the risk. Now Gordon and his team will map parts of the oceans where valuable minerals, metals and other materials may be worth the effort to mine.

http://www.tampabay.com/news/business/down-but-not-out-tampas-odyssey-marine-preps-to-swap-treasure-hunting-for/2289065