Oysters are salt-water dwelling molluscs with two shells (bivalve). They are found in marine or brackish water. Some oyster species have hard shells due to calcification and many species have irregular shapes. Most, but not all, oysters belong to the Ostreoidea superfamily.
1929: Introduction of Pacific Oysters to California
In 1929, the Pacific oyster was introduced to California waters, following an earlier introduction of the eastern oyster in 1875, as part of efforts to bolster declining native oyster populations.
1938: Invention of Oyster Stout
The first recorded use of oyster shells in beer brewing was in 1938 at the Hammerton Brewery in London, leading to the creation of the oyster stout style.
1948: Last Connecticut Oyster Sloop Built
The oyster sloop "Hope," completed in 1948, is believed to be the last Connecticut oyster sloop constructed, marking the decline of this traditional shipbuilding practice.
1965: Maryland Restricts Oyster Dredging
Until 1965, Maryland restricted oyster dredging to sailboats to limit the environmental impact on oyster beds. After 1965, motor boats were allowed for dredging but only on designated days.
1969: End of Connecticut's Sail-Only Oyster Harvesting Laws
Connecticut's laws restricting oyster harvesting to sailboats in state-owned beds, enacted before World War I, were lifted in 1969.
2000: Ancient Oyster Cultivation in Japan
Oyster cultivation in Japan can be traced back to at least 2000 BC, highlighting the long-standing significance of oysters in Japanese cuisine and culture.
2005: Global Oyster Harvest Dominated by China
By 2005, China had become the world's leading producer of oysters, accounting for 80% of the global harvest.
2008: Chesapeake Bay Oyster Population Decline
In 2008, it was estimated that the Chesapeake Bay's oyster population had declined so significantly that it would take nearly a year for the remaining oysters to filter the estuary's entire water volume, a process that historically took only three to four days.
2009: Chesapeake Bay Oyster Harvest Decline
The Chesapeake Bay oyster harvest in 2009 plummeted to less than 7,300 cubic meters, a stark contrast to the late 1880s when the harvest reached approximately 910,000 cubic meters.
2010: Chesapeake Bay Oyster Restoration Target
By 2010, the Chesapeake Bay Program in Maryland aimed to use oysters to reduce nitrogen compounds entering the bay by 8,600 metric tons annually.
2010: Guinness World Oyster Opening Championship Ends
The Guinness World Oyster Opening Championship, held annually at the Galway International Oyster Festival in Ireland, ended its association with Guinness in 2010 after running for several years.
2011: Galway Oyster Opening Championship Continues
After dropping "Guinness" from its title in 2011, the oyster opening championship in Galway, Ireland, continued as an annual event.
October 2017: Underwater Noise Pollution Impacts Oysters
A study published in October 2017 revealed that underwater noise pollution from sources like ships and explosions can disrupt oysters' behavior. The low-frequency sounds cause oysters to close their shells, potentially affecting their feeding, circadian rhythms, and spawning.