Amazing that the wood remained so well preserved after almost 2100 years. The article says that it may have been treated with resins as a preservative. They used copper nails-- you have to wonder if that also helped, copper being so toxic to living cells.....Shipwrecks in salt water are subject to invasion and destruction by screw worms, the big reason the wood parts usually deteriorate over time.....That's not a problem in fresh water. There are hundreds of shipwrecks well preserved in The Great Lakes where the cold, hypoxic water inhibits bacterial & fungal growth and there are no screwworms.
As an aside-- I looked up Mithridates quickly cuz I always get them all confused- those guys all look alike to me.... This ship was from M. VI....But the embarrassing Battle of Carrhae was during the war with M. IV....I had to laugh at the Wiki entry about the death of Crassus when he was tortured and killed by pouring molten gold down his throat. Wiki says "he was killed during a scuffle.."