- Cristi Quill
- 51:25:00 hour(s):minute(s):second(s)
- United States (San Diego)
The longest open saltwater SCUBA dive (female) is 51 hr 25 min 0 sec and was achieved by Cristi Quill at La Jolla Shores in San Diego, California, USA, on 11 July 2015.
Cristi attempted this record for the "Put Cancer Under Pressure" campaign.