Olympia Maru is a great wreck dive that allows divers to complete some deep dives. This is a deeper wreck in Coron Bay, sitting at around 30 meters. This boat was a steam engine boat but was converted into an oil engine before it was used during the Second World War. It was sunk in the area during the war and had been part of the Japanese war fleet.

The wreck has become a good wreck dive as the boat has become home to many different fish and large schools now congregate here. The cargo rooms are still intact and they can be penetrated as part of the dive. Divers can also examine the stern, gangways, bridge, the locker rooms, and boilers with some very good passages with light streaming through making the wreck look very beautiful. Most of the ship can be seen on one dive, as it is small enough to explore with one tank.

It is common for divers to see scorpion fish and crocodile fish lurking in the nooks and crannies and around the stern, bow, and mast, divers can see large schools of giant puffer fish, giant batfish, and banana fish. There are also many lionfish, snappers, razor fish, glassfish, and countless sponges that have all taken over the wreck. There is some black coral and divers can sometimes spot ghost pipefish and seahorses on the wreck.