OOC:
Great questions:
Light - there is a bit of dim light. Darkvision makes it appear as normal lighting however the murky water limits Darkvision to 120 yards outdoors.
As you approach, you see that the doors are 15 feet high and made of gold. They are intricately carved in bas relief with whimsical sea creatrures as well as the more common sharks, squids and whales. There are no handles or keyholes. They look like two solid pieces of metal. There is an elvish script above the door.