Following the Deepwater Horizon oil spill, determining the types and extents of damage to the ecosystems of the Gulf of Mexico has been – and continues to be - a high priority. This has been especially difficult with regard to deep-water habitats. Our expedition provides an opportunity to assist with that NOAA and national priority. Today we dove on a location in Mississippi Canyon lease blocks 294 and 338. An Oct/Nov 2010 expedition identified a deep-coral community here that showed signs of significant and recent impact. The area has been a major focus of study ever since. The purpose of revisiting this critical location was to determine change over time.