The area consists of large pool of water and a land mass that each occupy around half of the area. The pool of water appears to be connected to the ocean and a tower can be seen in the distance when looking outwards from the pool of water. This tower appears to be the lighthouse of Port Tanzia.
In both corners of the shore there are two broken ships the hunters can climb on, one ship contains a ballista mount, and the other ship contains one of the two dragonators. On the other side of the island in the pool of water is another ship that contains a second dragonator.
The base camp in the Tainted Sea can only be reached by using a Farcaster or fainting. It contains the usual items of First Aid Meds, Rations, Mini Whetstones, some bowgun ammo, Power Coatings and 20 Ballista Ammo for the two Ballistae in the fighting area. There is no bed.
Savvy Tabby in Port Tanzia sometimes says that although Tainted Sea (which he also says lies near to Port Tanzia) has a scary name, it is an ordinary patch of sea and ships pass through it without incident which is ironic since a fierce elder dragon like Dire Miralis lives here.