The lower mandible of the shoveller-duck is furnished with lamellae of equal length with these above, but finer; and in being thus furnished it differs conspicuously from the lower jaw of a whale, which is destitute of baleen.
Mokozabalaren behe-baraila goikoen luzera bereko xaflatxoez, baina meheagoz, horniturik dago, eta horrela horniturik dagoelako alde nabarmena du bizarrik gabeko balearen behe-barailatik.