I have just finished photographing and writing up a newly-acquired collection of shipwreck coins from the wreck of the Consolacion, a Spanish South Sea Armada galleon, lost in 1681 after striking a reef near Guayaquil Ecuador. These are classic "pirate treasure" coins. When the ship was attacked by pirates, the captain grounded the Consolacion on Santa Clara island, nicknamed Isla de Muerto (Island of the Dead), but struck a reef in the process. The vessel and its treasure then sank... these Consolacion coins are thus true pirate treasure coins.
Take a look! Ancient Resource: Shipwreck Treasure Coins