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Noun
1. marine mammal
Wikipedia definition
2. Marine mammalMarine mammals, which include seals, whales, dolphins, and walruses, form a diverse group of 128 species that rely on the ocean for their existence. They do not represent a distinct biological grouping, but rather are unified by their reliance on the marine environment for feeding. The level of dependence on the marine environment for existence varies considerably with species.
Read “Marine mammal” on English Wikipedia
Read “海獣” on Japanese Wikipedia
Read “Marine mammal” on DBpedia

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