The Grand Reefs were large coral banks located on the aquatic planet of Dac, located near the city of Orotoru G'am. Above the water, it featured large boulders and was decorated with tall statues of Mon Calamari. They were also the site of a podracing course.
This was the habitat of Dac's cubicle worm.
As of 24 BBY, Mars Guo was the track favorite. The Grand Reefs were the last of Dac's three podraces, and the second of the Hutt Championships.
- Strongholds of Resistance