A large Dugong slowly surfaces from feeding on a seagrass meadow below the ocean waters

ocean dugong seagrass marine science animal survey manatees mammal sea cow dugongidae navigational marker meadow feeding indigenous australia aboriginal conservation nature fluke citizen science study island seaweed meadows alismatales wirriya jalyanu sand environmental marine coastal vegetation salt water tropical estuaries intertidal rivers habitat ecosystems immersion nurseries gundurung saline pristine water underwater plant protection 4k drone