Innovative Marine Lab Revives Endangered White Abalone Population

On a sunny January afternoon in Bodega Bay, California, approximately 70 miles north of San Francisco, the White Abalone Culture Lab is bustling with activity. It is spawning day, and Alyssa Frederick, the program director, welcomes visitors into a room filled with troughs and tubs of bubbling seawater. This facility, part of the University of California, Davis (UC Davis) Bodega Marine Laboratory, focuses on studying ocean and coastal health, with a specific goal of reviving the endangered white abalone, known for its iridescent shell and delicate meat.

Inside the lab, a dedicated team of volunteers and biologists measures, weighs, and performs health diagnostics on the abalone, some of which are as large as coconuts. If deemed healthy, these sea snails will be treated with a hydrogen peroxide solution, affectionately dubbed a 'love potion,' which encourages the females to release eggs and the males to release sperm. The researchers are hopeful that the 110 white abalone in their care will successfully spawn, allowing them to nurture the offspring until they are ready to be released into their native waters along the southern California coast.

This breeding initiative is part of a long-term effort, spanning 25 years, to restore the white abalone population, which has suffered from overfishing and environmental changes. In 2001, when the first artificial spawning program was initiated, the population had dwindled to just 1% of its historical numbers, with approximately 2,000 individuals remaining. The white abalone was the first marine invertebrate to be listed as an endangered species, prompting the establishment of restoration programs.

Since the opening of the Bodega Marine Laboratory in 2011, scientists have successfully released over 20,000 white abalone into the ocean, representing a ten-fold increase in their numbers. The atmosphere in the lab during spawning day is filled with optimism and excitement, as the team eagerly anticipates the potential for millions of larvae to fill the troughs. To enhance the mood, researchers even dim the lights and play romantic music, believing it could positively influence the spawning process, despite the lack of scientific evidence to support this practice.

The significance of this spawning day is underscored by recent funding challenges. In April 2025, proposed budget cuts by the Trump administration threatened to reduce funding for the National Oceanic and Atmospheric Administration (NOAA), which supports the lab's operations. The proposed cuts included a three-year grant that funds the lab and its staff, creating uncertainty about the future of the white abalone program. Fortunately, anonymous donors stepped in to provide temporary financial support, and federal funding for 2026 has since been secured, ensuring the program can continue for at least two more years.

Frederick emphasizes the importance of diversifying funding sources to ensure the lab's sustainability in a fluctuating political climate. She notes, 'If you want to save a species, you can no longer rely fully on federal funding. That’s just poor risk management.' The lab's work is critical, as six of California's abalone species are currently struggling, with the black abalone also listed as endangered. Harvesting of red abalone has been banned until 2036, making the white abalone's recovery even more vital.

The white abalone population has faced numerous challenges over the decades. Once abundant along the California coast, they were heavily overfished, leading to a dramatic decline in their numbers. By the 1970s, the population had been decimated, with a 1992-93 survey revealing only three individuals in historic fishing sites where thousands once thrived. The abalone reproduce through a process called 'broadcast spawning,' where males and females release their reproductive cells into the ocean, creating larvae that eventually settle on rocks. However, by 2001, the remaining white abalone were too far apart to spawn naturally, prompting the establishment of the White Abalone Program.

The lab's efforts are not only focused on breeding but also on addressing habitat degradation caused by the loss of kelp forests, which are essential for the abalone's survival. A 2021 study revealed that 95% of kelp forests along the northern California coast have disappeared, primarily due to warming waters and the invasion of purple sea urchins. The decline of the sunflower sea star, the urchin's primary predator, has exacerbated this issue, leading to a significant reduction in kelp and, consequently, a lack of food for the abalone. Despite these challenges, Frederick remains hopeful, noting that successful spawning has produced millions of fertilized eggs, with many larvae expected to survive and be released into the wild.

Frederick's dedication to restoring the white abalone is palpable. She expresses her enthusiasm, stating, 'It’s just so hopeful. So many people studying the ocean or endangered species have a really hard job. They have to watch the ocean degrade or a species go extinct. In this situation, we get to actually restore the white abalone. It’s kind of amazing. That never happens.' With continued efforts and community support, the future of the white abalone looks brighter, and the potential for this species to thrive once again is within reach.