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CalCOFI California Cooperative Oceanic Fisheries Investigations, a partnership of NOAA-SWFSC, SIO, & CDF&W.

CalCOFI conducts oceanographic cruises off southern and central California four times a year. Research partners Scripps Institution of Oceanography, NOAA's Southwest Fisheries Science Center, & California Department of Fish & Wildlife conduct ecosystem monitoring on these seasonal research cruises.

Exciting news! CalCOFI was just granted $1.65M to study the effects of Ocean Acidification and Hypoxia (OAH) in southern...
10/08/2026

Exciting news! CalCOFI was just granted $1.65M to study the effects of Ocean Acidification and Hypoxia (OAH) in southern/central California waters alongside partners from Scripps Institution of Oceanography, the Southern California Coastal Water Research Project, NOAA Southwest Fisheries Science Center, and the Pacific Marine Environmental Laboratory. The project, Characterizing Ocean Acidification and Hypoxia Dynamics and Biological Responses in California State Waters to Inform CA Ocean Management, is designed to provide California agencies with additional scientific information that can inform state water quality and resource management decisions.

“I can’t wait to see what the research team finds over the next two and half years and how the state will use the information to better protect state waters and California’s marine biodiversity,” says Mark Gold, director of CalCOFI at Scripps Institution of Oceanography.

The funding will support studies of pH and oxygen trends over time, zooplankton responses to OAH, and pteropod shell dissolution using historical CalCOFI jar samples. These findings will then be communicated to state agencies so they can utilize the results in developing OAH management strategies for California.

To read more from SIO CalCOFI’s director, Mark Gold, on the exciting potential of this new project, visit the link in our bio.

Photo 1: An Oceanographic Technician preserves a water sample for Dissolved Inorganic Carbon analysis. Credit: Josie Adams, SIO
Photo 2: A pteropod shell under a microscope. Credit: NOAA

Meet the team: Throwback EditionThis is who keeps the oldest marine ecosystem monitoring program in the world running!
09/14/2026

Meet the team: Throwback Edition

This is who keeps the oldest marine ecosystem monitoring program in the world running!

Want to see some gorgeous scenery and cool creatures while gaining field experience and developing skills applicable to ...
08/03/2026

Want to see some gorgeous scenery and cool creatures while gaining field experience and developing skills applicable to a career in marine science? CalCOFI is accepting applications for trainee positions on future research cruises, including our upcoming fall and winter cruises! For more information, visit calcofi.org/about/trainee-program/ and email [email protected] and [email protected] to apply!

See you out there 🌊🐋🧬🧪

Photo credit: Josie Adams, Annie Effinger, Kelsey Vogel UCSD/SIO

Hey CalCOFI community! Great news- the CalCOFI Conference 2026 video recordings are now live on our website. If you coul...
07/28/2026

Hey CalCOFI community! Great news- the CalCOFI Conference 2026 video recordings are now live on our website. If you couldn't make it to the conference or would like to revisit any of the talks, please visit https://calcofi.org/conference/conference-2026/ or go to the link in our bio!

Photo credit: Annie Effinger, UCSD/SIO

Some excellent photos taken on the 2026 CalCOFI summer cruise by marine mammal observer Ernesto Vázquez! Especially exci...
07/11/2026

Some excellent photos taken on the 2026 CalCOFI summer cruise by marine mammal observer Ernesto Vázquez! Especially exciting was the sighting of Cuvier's beaked whales (Ziphius cavirostris). They are the most widely distributed beaked whales and are known for being the deepest and longest-diving mammal, capable of diving to nearly 3,000m and holding their breath for over 3 hours!

🐋 Photos 1 & 2: Cuvier's beaked whale (Ziphius cavirostris)
🐬 Photos 3 & 4: Risso's dolphins (Grampus griseus)
🌊 Photos 5 & 6: Short beak common dolphins (Delphinus delphis)

🌊 Repost from Los Angeles Times At a time of sea level rise, ocean acidification, record-breaking marine heat waves and ...
06/15/2026

🌊 Repost from Los Angeles Times

At a time of sea level rise, ocean acidification, record-breaking marine heat waves and the arrival of a particularly strong El Niño, a little-known but invaluable marine ecosystem monitoring program off the Southern California coast has never been more essential.

The California Cooperative Oceanic Fisheries Investigations is the world’s oldest and longest-running effort of its kind. Every season for more than three-quarters of a century, researchers have sailed hundreds of miles off the Golden State's coast and collected a dizzying array of zooplankton, microscopic plant matter, larvae and all manner of fish.

Like taking a pulse of the ocean at particular moments in time, generations of scientists have meticulously documented water temperature, salinity, acidity, oxygen levels and dozens of other data points that have become the gold standard for understanding the ocean and how it’s changing.

Read more about how CalCOFI helped shape our modern understanding of El Niño at the link in bio.

📷 NOAA Fisheries Scripps Instn. of Oceanography and James Wilkinson at

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