Exclusive to: 
“There must be a way to get that tar out.”
“There's something flammable down there.”
“Is bubbling.”
“Corruption oozes from beneath.”
“THERE'S SOMETHING USEFUL IN THIS FILTHY POND”
“It appears to be a natural tar well.”
“Yep. There's tar down there.”
“Something foul festers beneath.”
“A highly combustible source of fuel lays just beneath the waves.”
“Sömething vile bubbles fröm beneath.”
“The yucky stuff down there might be useful.”
“Aww, the tar's seeping right into the ocean water.”
“I think there's tar down there.”
“There be sludgy treasure down ther'.”
“HAST BLACK GOO WITHIN”
“Gloopy Puddle”
“Black gold. Or black goop. Take your pick.”
The Tar Slick is a naturally-spawning object exclusive to the Shipwrecked DLC. It can be found anywhere in the Medium Ocean or Deep Ocean. It is a source of Tar, which must be extracted by building a Tar Extractor. A Tar Slick does not run out, and cannot be destroyed, making Tar a renewable resource. A Tar Slick can also be created at the player's will using a Quacken Drill, thus making Tar Slick renewable.
Trivia
- The Tar Slick was added to the Shipwrecked DLC more than a year after its official completion in the Home Sea Home update, after being tested in a beta branch for several months.
Gallery
A Tar Extractor producing Tar from a Tar Slick.
A Tar Slick on the Map.
Tar Slick as seen in the poster for the Home Sea Home update.
