coral reef
['chambered nautilus, pearly nautilus, nautilus', 'eft', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'centipede', 'amphibian, amphibious vehicle', 'coho, cohoe, coho salmon, blue jack, silver salmon, Oncorhynchus kisutch', 'submarine, pigboat, sub, U-boat']