Britain is dropping 20 concrete reef cubes and 44 tons of scallop shells into the sea to bring back native oysters

While one might assume that lowering huge white blocks of concrete into the sea was an attempt at dumping construction waste offshore, in Britain's North Sea it is a conservation effort. The country is dumping 20 carefully designed structures into the deep waters to restore the population of the European native oyster, Ostrea edulis, along England's northeast coast.The 2025 operation combined the reef cubes with 4,000 mature oysters, more than 35,000 juveniles and about 44 US tons of repurposed scallop shells. In the United Kingdom, the number of native oysters has fallen by more than 95% since the 1800s and the project is studying whether sturdy engineering can give a lost ecosystem the foothold it needs to rebuild, as per a report by econews.Twenty cubes for a new seabedEach reef cube weighs about 6.6 US tons, meaning the 20 structures together weigh around 132 tons. They have been created from Marine Crete, a seawater-resistant material that the project team describes as a carbon-neutral alternative to ordinary concrete.They have been designed with ridges, textured surfaces and large openings to give oysters a place to attach while creating hiding spaces for fish, lobsters, spon...