Bathymetry, the study of underwater depth data, is revolutionizing marine navigation and ocean sciences by transforming water layers into detailed landscapes. A new bathymetry map has been released to enable developers to create custom marine maps, with companies like Zero Six Zero using this data to enhance expedition tracking apps. The Great Reef Census has also employed detailed bathymetry data to guide surveys of the Great Barrier Reef, allowing for better planning and exploration of areas not visible through satellite imagery. Mapbox has developed a public tileset, mapbox-public.bathymetry, using Natural Earth data, which simplifies the integration of bathymetric data into maps without the need for processing raw data. The creative possibilities for styling this data are vast, with options for nautical chart-inspired designs and underwater 3D effects, encouraging developers to explore and share their creations on social media platforms like Twitter.