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Ocean biodiversity information system
OBIS is a global open-access data and information clearing-house on marine biodiversity for science, conservation and sustainable development - 
    
      
Gridded bathymetry data
GEBCO’s current gridded bathymetric data set, the GEBCO_2021 Grid, is a global terrain model for ocean and land, providing elevation data, in meters, on a 15 arc-second interval...