The Australian American artist Anita Glesta’s installation will transform the storied overpass for two nights this month to raise awareness of Hudson Canyon’s rich ecosystem

Doug Aitken is creating a series of large-scale works will be moored off the coast of St Barts

The Mystic Seaport Museum in Connecticut is foregrounding ocean ecology in its first contemporary art exhibition, with new commissions by American painter Alexis Rockman

The market for seascapes has plunged and younger generations are scuttling galleries’ hopes for a new collector base