An oyster’s journey from sea to spoon in Ireland: ‘It’s far from umami we were reared’

In the sheltered waters of Castlemaine Harbour, nestled between the Dingle and Iveragh peninsulas in County Kerry, the Sugrue and Casey families have been cultivating shellfish for four generations. On a recent morning, Sharon Sugrue stood on the edge of the bay, watching the tides shift and the boats adjust their direction accordingly. She explained that the timing of the tides determines when the oyster beds become accessible, revealing a landscape rich with potential. Alongside her brother Micheál Sugrue and business partner Emmet Casey, she runs Réalt na Mara Shellfish, a company dedicated to harvesting and farming oysters and mussels in this coastal region. The family's connection to the sea dates back to the 1960s, when their grandfathers, Patrick Sugrue and Jimmy Casey, worked on the local mussel beds and fisheries. Over the decades, the Sugrues and Caseys have transformed their ancestral home into a thriving enterprise, blending tradition with modern aquaculture practices. Their operation includes both wild harvesting of native oysters during the appropriate season, September to April, and the cultivation of Pacific oysters, which were introduced to Ireland in the 1970s. These non-native species have thrived in the nutrient-rich waters of the area, offering a sustainable alternative to the declining native oyster population. Sharon, who also serves as a marine biologist, emphasized the importance of environmental factors in shaping the flavor profile of the oysters. She described the concept of "merroir," an aquatic equivalent of terroir, highlighting how the unique combination of tides, plankton, salinity, and Atlantic waters contributes to the distinct taste of the oysters grown in this region. While native flat oysters typically offer a heavier, more mineral-driven flavor, the Pacific oysters cultivated here have developed a distinctive, unmistakably Irish character. As the tides shifted, Micheál Sugrue joined his sister on the beach, signaling that it was time to head out to the oyster beds. Together with Casey, they navigated their custom-built flat-bottomed barge, The Endeavour, across the gently lapping waters to the sandbank where the oysters are harvested. The process revealed a delicate balance of nature and human intervention, ensuring that the oysters remain healthy and flavorful. The sustainability of oyster farming has drawn attention from academic institutions such as the Centre for Environmental Humanities at Trinity College Dublin. Researchers have noted that oyster farming can be among the most environmentally friendly forms of aquaculture, contributing positively to water quality and biodiversity. This aligns with the efforts of Réalt na Mara Shellfish to maintain ecological balance while supporting local traditions and economic stability. The Sugrue and Casey families continue to manage their operations with care, adhering to strict regulations and seasonal closures designed to protect native oyster stocks. Despite the challenges posed by overfishing, pollution, and habitat loss, the careful stewardship of these resources ensures that future generations can benefit from the same opportunities that have sustained their families for decades. As the sun set over the horizon, casting a golden hue across the bay, the rhythmic ebb and flow of the tides continued, a constant reminder of the enduring relationship between the land, the sea, and those who call this place home.