Every fish survey counts! Data collected by REEF volunteer divers are helping scientists better understand rockfish populations along the West Coast of the United States, with the potential to inform important fisheries management decisions.
Dr. Nick Tolimieri, a research fisheries biologist with NOAA Fisheries, is using REEF Volunteer Fish Survey Project data to track populations of rockfish, particularly young-of-the-year (YOY) fish, or fish born within the past year. By looking at how the abundance of these young fish changes over time, scientists can gain valuable insight into the health of rockfish populations and what future populations might look like.
REEF recently provided NOAA with rockfish survey data from California, Oregon, and Washington to help expand the geographic coverage of this research. Preliminary results were presented to a scientific advisory committee in September 2026 and received positive feedback. The researchers hope to incorporate these findings into the upcoming California Current Ecosystem Status Report, which helps inform decisions made by the Pacific Fishery Management Council.
Since 1993, nearly 18,000 REEF volunteers have contributed to one of the world's largest marine life databases. By making these data available to researchers, resource managers, and the public, REEF helps turn recreational dives into valuable contributions to ocean science and conservation. This latest collaboration is another great example of how every survey can make a difference!
YOY Rockfish photo by Janna Nichols.