What is the American English word for ""θαλάσσιος ίππος""?

Greek

θαλάσσιος ίππος

θαλάσσιος ίππος-walrus.svg
American English

walrus

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Example sentences

American EnglishA seal is a carnivorous, semi-aquatic marine mammal.

How ""θαλάσσιος ίππος"" is said across the globe.