EntityQ7180402· pop 27· linked from 611 articlesblue holeSign in to savemarine sinkhole or cavernConnectionskarstEntityanoxic watersEntityThe BahamasCountryBelizeCountryOhioEntitylakeEntityRed SeaEntitybacteriaEntityCaribbean SeaEntityCaribbeanEntityInternational Standard Book NumberEntitysandEntityGreat Barrier ReefEntitySouth China SeaEntitycaveEntityCrocodileEntityWayback MachineEntityNematodaEntitydigital object identifierEntitysea levelEntityCategoriesCave geologyMarine geologySea cavesSinkholesUnderwater diving sites