This is one of the masts on the Bayronto, in the Gulf of Mexico on July 30 2005. It's laying propped out of the sand to the port (north) side of the overturned wreck. most shots at 100' or so, visibility dropped to 15' or so after a thermocline at 60'.
The Goliath Grouper were everywhere... I counted 18 in my sight at one time.